removes host file to make mdns working.

Co-authored-by: Pbopbo <p.obernesser@freenet.de>
Reviewed-on: #26

.gitignore

@@ -52,3 +52,10 @@ src/auracast/server/stream_settings2.json
 src/scripts/temperature_log*
 
 src/auracast/server/recordings/
+src/auracast/server/led_settings.json
+
+
+# Dante license files
+*.lic
+src/dep/dante_package/dante_data/activation/device.lic
+src/dep/dante_package/dante_data/activation/manufacturer.cert

AGENTS.md

@@ -4,8 +4,11 @@
 - this projects uses poetry for package management 
 - if something should be run in a python env use 'poetry run'
 
+# Environment
+- this application normally runs on an embedded linux on a cm4
 
 ## Application
 - this is a bluetooth Auracast transmitter application
+- if you add a new parameter for a stream make sure it is saved to the settings.json so it is persisted
 - it consists of multicast_frontend.py and multicast_server.py mainly which connect to each other via a rest api
-
+- after you implemented something the user will mainly test it and you should call the update_and_run_server_and_frontend.sh script if the server and frontend were already running.

poetry.lock

@@ -270,51 +270,6 @@ optional = false
 python-versions = ">=3.9"
 groups = ["main"]
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-    {file = "av-14.4.0-cp39-cp39-musllinux_1_2_x86_64.whl", hash = "sha256:c3048e333da1367a2bca47e69593e10bc70f027d876adee9d1582c8cb818f36a"},
-    {file = "av-14.4.0-cp39-cp39-win_amd64.whl", hash = "sha256:5d6f25570d0782dd05640c7e1f71cb29857d94d915b5521a1e757ecae78a5a50"},
     {file = "av-14.4.0.tar.gz", hash = "sha256:3ecbf803a7fdf67229c0edada0830d6bfaea4d10bfb24f0c3f4e607cd1064b42"},
 ]
 
@@ -1849,6 +1804,22 @@ files = [
     {file = "protobuf-6.30.2.tar.gz", hash = "sha256:35c859ae076d8c56054c25b59e5e59638d86545ed6e2b6efac6be0b6ea3ba048"},
 ]
 
+[[package]]
+name = "pyalsaaudio"
+version = "0.11.0"
+description = "ALSA bindings"
+optional = false
+python-versions = "*"
+groups = ["main"]
+files = []
+develop = false
+
+[package.source]
+type = "git"
+url = "ssh://git@gitea.summitwave.work:222/auracaster/sw_pyalsaaudio.git"
+reference = "b3d11582e03df6929b2e7acbaa1306afc7b8a6bc"
+resolved_reference = "b3d11582e03df6929b2e7acbaa1306afc7b8a6bc"
+
 [[package]]
 name = "pyarrow"
 version = "20.0.0"
@@ -2443,6 +2414,22 @@ files = [
     {file = "rpds_py-0.25.1.tar.gz", hash = "sha256:8960b6dac09b62dac26e75d7e2c4a22efb835d827a7278c34f72b2b84fa160e3"},
 ]
 
+[[package]]
+name = "rpi-gpio"
+version = "0.7.1"
+description = "A module to control Raspberry Pi GPIO channels"
+optional = false
+python-versions = "*"
+groups = ["main"]
+files = [
+    {file = "RPi.GPIO-0.7.1-cp27-cp27mu-linux_armv6l.whl", hash = "sha256:b86b66dc02faa5461b443a1e1f0c1d209d64ab5229696f32fb3b0215e0600c8c"},
+    {file = "RPi.GPIO-0.7.1-cp310-cp310-linux_armv6l.whl", hash = "sha256:57b6c044ef5375a78c8dda27cdfadf329e76aa6943cd6cffbbbd345a9adf9ca5"},
+    {file = "RPi.GPIO-0.7.1-cp37-cp37m-linux_armv6l.whl", hash = "sha256:77afb817b81331ce3049a4b8f94a85e41b7c404d8e56b61ac0f1eb75c3120868"},
+    {file = "RPi.GPIO-0.7.1-cp38-cp38-linux_armv6l.whl", hash = "sha256:29226823da8b5ccb9001d795a944f2e00924eeae583490f0bc7317581172c624"},
+    {file = "RPi.GPIO-0.7.1-cp39-cp39-linux_armv6l.whl", hash = "sha256:15311d3b063b71dee738cd26570effc9985a952454d162937c34e08c0fc99902"},
+    {file = "RPi.GPIO-0.7.1.tar.gz", hash = "sha256:cd61c4b03c37b62bba4a5acfea9862749c33c618e0295e7e90aa4713fb373b70"},
+]
+
 [[package]]
 name = "samplerate"
 version = "0.2.2"
@@ -2976,4 +2963,4 @@ test = ["pytest", "pytest-asyncio"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.11"
-content-hash = "3c9f92c7a5af40f98da9c7824d9c2a6f7eb809e91e43cfef4995761b2e887256"
+content-hash = "7bccf2978170ead195e1e8cff151823a5276823195a239622186fcec830154d9"

pyproject.toml

@@ -17,7 +17,9 @@ dependencies = [
     "sounddevice (>=0.5.2,<0.6.0)",
     "python-dotenv (>=1.1.1,<2.0.0)",
     "smbus2 (>=0.5.0,<0.6.0)",
-    "samplerate (>=0.2.2,<0.3.0)"
+    "samplerate (>=0.2.2,<0.3.0)",
+    "rpi-gpio (>=0.7.1,<0.8.0)",
+    "pyalsaaudio @ git+ssh://git@gitea.summitwave.work:222/auracaster/sw_pyalsaaudio.git@b3d11582e03df6929b2e7acbaa1306afc7b8a6bc"
 ]
 
 [project.optional-dependencies]

src/auracast/auracast_config.py

@@ -111,3 +111,5 @@ class AuracastConfigGroup(AuracastGlobalConfig):
     bigs: List[AuracastBigConfig] = [
         AuracastBigConfigDeu(),
     ]
+    analog_gain_db_left: float = 0.0  # ADC gain level for analog mode left channel (-12 to 18 dB)
+    analog_gain_db_right: float = 0.0  # ADC gain level for analog mode right channel (-12 to 18 dB)

src/auracast/multicast.py

@@ -30,6 +30,7 @@ import time
 import threading
 
 import numpy as np  # for audio down-mix
+import samplerate
 import os
 
 import lc3  # type: ignore  # pylint: disable=E0401
@@ -56,7 +57,7 @@ from auracast.utils.webrtc_audio_input import WebRTCAudioInput
 
 
 # Patch sounddevice.InputStream globally to use low-latency settings
-import sounddevice as sd
+import alsaaudio
 from collections import deque
 
 
@@ -139,96 +140,146 @@ class AlsaArecordAudioInput(audio_io.AudioInput):
         self._proc = None
 
 
-class ModSoundDeviceAudioInput(audio_io.SoundDeviceAudioInput):
+class PyAlsaAudioInput(audio_io.ThreadedAudioInput):
-    """Patched SoundDeviceAudioInput with low-latency capture and adaptive resampling."""
+    """PyALSA audio input with non-blocking reads - supports mono/stereo."""
 
-    def _open(self):
+    def __init__(self, device, pcm_format: audio_io.PcmFormat):
-        """Create RawInputStream with low-latency parameters and initialize ring buffer."""
+        super().__init__()
-        dev_info = sd.query_devices(self._device)
+        logging.info("PyALSA: device = %s", device)
-        hostapis = sd.query_hostapis()
+        self._device = str(device) if not isinstance(device, str) else device
-        api_index = dev_info.get('hostapi')
+        if self._device.isdigit():
-        api_name = hostapis[api_index]['name'] if isinstance(api_index, int) and 0 <= api_index < len(hostapis) else 'unknown'
+            self._device = 'default' if self._device == '0' else f'hw:{self._device}'
-        pa_ver = sd.get_portaudio_version()
+        self._pcm_format = pcm_format
+        self._pcm = None
+        self._actual_channels = None
+        self._periodsize = None
+        self._hw_channels = None
+        self._first_read = True
+        self._resampler = None
+        self._resampler_buffer = np.empty(0, dtype=np.float32)
 
-        logging.info(
+    def _open(self) -> audio_io.PcmFormat:
-            "SoundDevice backend=%s device='%s' (id=%s) ch=%s default_low_input_latency=%.4f default_high_input_latency=%.4f portaudio=%s",
+        ALSA_PERIODSIZE = 240
-            api_name,
+        ALSA_PERIODS = 4
-            dev_info.get('name'),
+        ALSA_MODE = alsaaudio.PCM_NONBLOCK
-            self._device,
-            dev_info.get('max_input_channels'),
-            float(dev_info.get('default_low_input_latency') or 0.0),
-            float(dev_info.get('default_high_input_latency') or 0.0),
-            pa_ver[1] if isinstance(pa_ver, tuple) and len(pa_ver) >= 2 else pa_ver,
-        )
-        # Create RawInputStream with injected low-latency parameters
-        # Target ~2 ms blocksize (48 kHz -> 96 frames). For other rates, keep ~2 ms.
-        _sr = int(self._pcm_format.sample_rate)
         
-        self.counter=0
+        requested_rate = int(self._pcm_format.sample_rate)
-        self.max_avail=0
+        requested_channels = int(self._pcm_format.channels)
-        self.logfile_name="available_samples.txt"
+        self._periodsize = ALSA_PERIODSIZE
-        self.blocksize = 120
         
-        if os.path.exists(self.logfile_name):
+        self._pcm = alsaaudio.PCM(
-            os.remove(self.logfile_name)
+            type=alsaaudio.PCM_CAPTURE,
-
+            mode=ALSA_MODE,
-        self._stream = sd.RawInputStream(
-            samplerate=self._pcm_format.sample_rate,
             device=self._device,
-            channels=self._pcm_format.channels,
+            periods=ALSA_PERIODS,
-            dtype='int16',
-            blocksize=self.blocksize,
-            latency=0.004,
         )
-        self._stream.start()
+        
+        self._pcm.setchannels(requested_channels)
+        self._pcm.setformat(alsaaudio.PCM_FORMAT_S16_LE)
+        actual_rate = self._pcm.setrate(requested_rate)
+        self._pcm.setperiodsize(ALSA_PERIODSIZE)
+        
+        logging.info("PyALSA: device=%s rate=%d ch=%d periodsize=%d (%.1fms) periods=%d mode=%s", 
+                     self._device, actual_rate, requested_channels, ALSA_PERIODSIZE, 
+                     (ALSA_PERIODSIZE / actual_rate) * 1000, ALSA_PERIODS, ALSA_MODE)
+        
+        if actual_rate != requested_rate:
+            logging.warning("PyALSA: Sample rate mismatch! requested=%d actual=%d", requested_rate, actual_rate)
+        
+        self._actual_channels = requested_channels
+        self._resampler = samplerate.Resampler('sinc_fastest', channels=requested_channels)
+        self._resampler_buffer = np.empty(0, dtype=np.float32)
+
+        self._bang_bang = 0
         
         return audio_io.PcmFormat(
             audio_io.PcmFormat.Endianness.LITTLE,
             audio_io.PcmFormat.SampleType.INT16,
-            self._pcm_format.sample_rate,
+            actual_rate,
-            1,
+            requested_channels,
         )
 
     def _read(self, frame_size: int) -> bytes:
-        """Read PCM samples from the stream."""
+        try:
+            avail = self._pcm.avail()
+            logging.debug("PyALSA: avail before read: %d", avail)
+            length, data = self._pcm.read_sw(frame_size + self._bang_bang)
+            avail = self._pcm.avail()
+            SETPOINT = 120 
+            TOLERANCE = 80 
+            if avail < SETPOINT - TOLERANCE:
+                self._bang_bang = -1 
+            elif avail > SETPOINT + TOLERANCE:
+                self._bang_bang = 1
+            else:
+                self._bang_bang = 0
                 
-        #if self.counter % 50 == 0:
-        frame_size = frame_size + 1 # consume samples a little faster to avoid latency akkumulation
                 
-        pcm_buffer, overflowed = self._stream.read(frame_size)
+            logging.debug("PyALSA: read length=%d, data length=%d, avail=%d, bang_bang=%d", length, len(data), avail, self._bang_bang)
-        if overflowed:
-            logging.warning("SoundDeviceAudioInput: overflowed")
 
-        n_available = self._stream.read_available
+            if length > 0:
+                if self._first_read:
+                    expected_mono = self._periodsize * 2
+                    expected_stereo = self._periodsize * 2 * 2
+                    # self._hw_channels = 2 if len(data) == expected_stereo else 1
+                    self._hw_channels = self._actual_channels
+                    logging.info("PyALSA first read: bytes=%d detected_hw_channels=%d requested_channels=%d", 
+                                len(data), self._hw_channels, self._actual_channels)
+                    self._first_read = False
                 
-        # adapt = n_available > 20
+                if self._hw_channels == 2 and self._actual_channels == 1:
-        # if adapt:
+                    pcm_stereo = np.frombuffer(data, dtype=np.int16)
-        #     pcm_extra, overflowed = self._stream.read(3)
+                    pcm_mono = pcm_stereo[::2]
-        #     logging.info('consuming extra samples, available was %d', n_available)
+                    data = pcm_mono.tobytes()
-        #     if overflowed:
-        #         logging.warning("SoundDeviceAudioInput: overflowed")
                 
-        #     out = bytes(pcm_buffer) +  bytes(pcm_extra)
+                actual_samples = len(data) // (2 * self._actual_channels)
-        # else:
+                ratio = frame_size / actual_samples
-        out = bytes(pcm_buffer)     
+                pcm_f32 = np.frombuffer(data, dtype=np.int16).astype(np.float32) / 32768.0
+                if self._actual_channels > 1:
+                    pcm_f32 = pcm_f32.reshape(-1, self._actual_channels)
+                resampled = self._resampler.process(pcm_f32, ratio, end_of_input=False)
+                if self._actual_channels > 1:
+                    resampled = resampled.reshape(-1)
+                self._resampler_buffer = np.concatenate([self._resampler_buffer, resampled])
+            else:
+                logging.warning("PyALSA: No data read from ALSA")
+                self._resampler_buffer = np.concatenate([
+                    self._resampler_buffer,
+                    np.zeros(frame_size * self._actual_channels, dtype=np.float32),
+                ])
+        except alsaaudio.ALSAAudioError as e:
+            logging.error("PyALSA: ALSA read error: %s", e)
+            self._resampler_buffer = np.concatenate([
+                self._resampler_buffer,
+                np.zeros(frame_size * self._actual_channels, dtype=np.float32),
+            ])
+        except Exception as e:
+            logging.error("PyALSA: Unexpected error in _read: %s", e, exc_info=True)
+            self._resampler_buffer = np.concatenate([
+                self._resampler_buffer,
+                np.zeros(frame_size * self._actual_channels, dtype=np.float32),
+            ])
 
-        self.max_avail = max(self.max_avail, n_available)
+        needed = frame_size * self._actual_channels
+        if len(self._resampler_buffer) < needed:
+            pad = np.zeros(needed - len(self._resampler_buffer), dtype=np.float32)
+            self._resampler_buffer = np.concatenate([self._resampler_buffer, pad])
+            logging.debug("PyALSA: padded buffer with %d samples", needed - len(self._resampler_buffer))
 
-        #Diagnostics 
+        output = self._resampler_buffer[:needed]
-        #with open(self.logfile_name, "a", encoding="utf-8") as f:
+        self._resampler_buffer = self._resampler_buffer[needed:]
-        #    f.write(f"{n_available}, {adapt}, {round(self._runavg, 2)}, {overflowed}\n")
 
-        if self.counter % 500 == 0:
+        logging.debug("PyALSA: resampler_buffer remaining=%d", len(self._resampler_buffer))
-            logging.info(
+        return np.clip(output * 32767.0, -32768, 32767).astype(np.int16).tobytes()
-                "read available=%d, max=%d, latency:%d", 
-                n_available, self.max_avail, self._stream.latency
-            )
-            self.max_avail = 0
 
-        self.counter += 1
-        return out
   
-audio_io.SoundDeviceAudioInput = ModSoundDeviceAudioInput
+
+    def _close(self) -> None:
+        if self._pcm:
+            self._pcm.close()
+            self._pcm = None
+
+audio_io.SoundDeviceAudioInput = PyAlsaAudioInput
 
 # modified from bumble
 class ModWaveAudioInput(audio_io.ThreadedAudioInput):
@@ -538,7 +589,7 @@ async def init_broadcast(
 
     def on_flow():
         data_packet_queue = iso_queue.data_packet_queue
-        print(
+        logging.info(
             f'\rPACKETS: pending={data_packet_queue.pending}, '
             f'queued={data_packet_queue.queued}, '
             f'completed={data_packet_queue.completed}',
@@ -638,6 +689,12 @@ class Streamer():
         except Exception:
             pass
 
+    def get_audio_levels(self) -> list[float]:
+        """Return current RMS audio levels (0.0-1.0) for each BIG."""
+        if not self.bigs:
+            return []
+        return [big.get('_audio_level_rms', 0.0) for big in self.bigs.values()]
+
     async def stream(self):
 
         bigs = self.bigs
@@ -754,7 +811,11 @@ class Streamer():
                     if input_format == 'auto':
                         raise ValueError('input format details required for alsa input')
                     pcm = audio_io.PcmFormat.from_str(input_format)
-                    audio_input = AlsaArecordAudioInput(audio_source[5:], pcm)
+                    device_name = audio_source[5:]
+                    if device_name.startswith('dante_'):
+                        audio_input = PyAlsaAudioInput(device_name, pcm)
+                    else:
+                        audio_input = AlsaArecordAudioInput(device_name, pcm)
                 else:
                     audio_input = await audio_io.create_audio_input(audio_source, input_format)
                 # Store early so stop_streaming can close even if open() fails
@@ -852,6 +913,11 @@ class Streamer():
                         stream_finished[i] = True
                         continue
 
+                    # Compute RMS audio level (normalized 0.0-1.0) for level monitoring
+                    pcm_samples = np.frombuffer(pcm_frame, dtype=np.int16).astype(np.float32)
+                    rms = np.sqrt(np.mean(pcm_samples ** 2)) / 32768.0 if len(pcm_samples) > 0 else 0.0
+                    big['_audio_level_rms'] = float(rms)
+
                     # Measure LC3 encoding time
                     t1 = time.perf_counter()
                     num_bis = big.get('num_bis', 1)

src/auracast/multicast_control.py

@@ -38,6 +38,12 @@ class Multicaster:
             'is_streaming': streaming,
         }
 
+    def get_audio_levels(self) -> list[float]:
+        """Return current RMS audio levels (0.0-1.0) for each BIG."""
+        if self.streamer is not None and self.streamer.is_streaming:
+            return self.streamer.get_audio_levels()
+        return []
+    
     async def init_broadcast(self):
         self.device_acm = multicast.create_device(self.global_conf)
 
@@ -137,6 +143,10 @@ async def main():
         level=os.environ.get('LOG_LEVEL', logging.DEBUG),
         format='%(module)s.py:%(lineno)d %(levelname)s: %(message)s'
     )
+    
+    # Enable debug logging for bumble
+    # logging.getLogger('bumble').setLevel(logging.DEBUG)
+    
     os.chdir(os.path.dirname(__file__))
 
     global_conf = auracast_config.AuracastGlobalConfig(

src/auracast/server/http_to_https_redirect.py

@@ -0,0 +1,42 @@
+"""Minimal HTTP server that redirects all requests to HTTPS (port 443).
+
+Run on port 80 alongside the HTTPS Streamlit frontend so that users who
+type a bare IP address into their browser are automatically forwarded.
+"""
+
+import http.server
+import sys
+
+
+class RedirectHandler(http.server.BaseHTTPRequestHandler):
+    def do_GET(self):
+        host = self.headers.get("Host", "").split(":")[0] or self.server.server_address[0]
+        target = f"https://{host}{self.path}"
+        self.send_response(301)
+        self.send_header("Location", target)
+        self.end_headers()
+
+    # Handle every method the same way
+    do_POST = do_GET
+    do_PUT = do_GET
+    do_DELETE = do_GET
+    do_HEAD = do_GET
+
+    def log_message(self, format, *args):
+        # Keep logging minimal
+        sys.stderr.write(f"[http-redirect] {self.address_string()} -> https  {args[0] if args else ''}\n")
+
+
+def main():
+    port = int(sys.argv[1]) if len(sys.argv) > 1 else 80
+    server = http.server.HTTPServer(("0.0.0.0", port), RedirectHandler)
+    print(f"HTTP->HTTPS redirect server listening on 0.0.0.0:{port}")
+    try:
+        server.serve_forever()
+    except KeyboardInterrupt:
+        pass
+    server.server_close()
+
+
+if __name__ == "__main__":
+    main()

src/auracast/server/multicast_frontend.py

@@ -1,6 +1,7 @@
 # frontend/app.py
 import os
 import time
+import math
 import logging as log
 from PIL import Image
 
@@ -70,6 +71,10 @@ if not is_pw_disabled():
         with st.form("signin_form"):
             pw = st.text_input("Password", type="password")
             submitted = st.form_submit_button("Sign in")
+        st.components.v1.html(
+            "<script>setTimeout(()=>window.parent.document.querySelector('input[type=\"password\"]')?.focus(),100)</script>",
+            height=0
+        )
         if submitted:
             if verify_password(pw, pw_rec):
                 st.session_state['frontend_authenticated'] = True
@@ -196,6 +201,116 @@ if audio_mode == "Demo":
 else:
     start_stream, stop_stream = render_stream_controls(is_streaming, "Start Auracast", "Stop Auracast", running_mode, secondary_is_streaming)
 
+# Analog gain control (only for Analog mode, placed below start button)
+analog_gain_db_left = 0  # default (dB)
+analog_gain_db_right = 0  # default (dB)
+if audio_mode == "Analog":
+    if '_analog_gain_db_left' not in st.session_state:
+        st.session_state['_analog_gain_db_left'] = max(-12, min(18, int(saved_settings.get('analog_gain_db_left', 0))))
+    if '_analog_gain_db_right' not in st.session_state:
+        st.session_state['_analog_gain_db_right'] = max(-12, min(18, int(saved_settings.get('analog_gain_db_right', 0))))
+    if '_gain_link_channels' not in st.session_state:
+        st.session_state['_gain_link_channels'] = True
+
+    link_channels = st.checkbox(
+        "Link audio channel gain",
+        key='_gain_link_channels',
+        help="When enabled, Ch 2 mirrors Ch 1."
+    )
+    _gain_col1, _gain_col2 = st.columns(2)
+    with _gain_col1:
+        analog_gain_db_left = st.slider(
+            "Ch 1 Input Gain",
+            min_value=-12,
+            max_value=18,
+            key='_analog_gain_db_left',
+            step=1,
+            format="%d dB",
+            help="ADC gain for channel 1 (-12 to 18 dB). Default is 0 dB."
+        )
+    with _gain_col2:
+        if link_channels:
+            st.session_state['_analog_gain_db_right'] = analog_gain_db_left
+        elif st.session_state.get('_prev_gain_link_channels', True):
+            # Transition: just unlinked — seed Ch 2 from Ch 1 so it doesn't jump to min
+            st.session_state['_analog_gain_db_right'] = analog_gain_db_left
+        st.session_state['_prev_gain_link_channels'] = link_channels
+        analog_gain_db_right = st.slider(
+            "Ch 2 Input Gain",
+            min_value=-12,
+            max_value=18,
+            key='_analog_gain_db_right',
+            step=1,
+            format="%d dB",
+            disabled=link_channels,
+            help="Uncheck 'Link audio channel gain' to adjust Ch 2 independently." if link_channels else "ADC gain for channel 2 (-12 to 18 dB). Default is 0 dB."
+        )
+    # Apply gain live while streaming whenever either slider value changes
+    if is_streaming:
+        prev_left = st.session_state.get('_prev_analog_gain_db_left')
+        prev_right = st.session_state.get('_prev_analog_gain_db_right')
+        if prev_left != analog_gain_db_left or prev_right != analog_gain_db_right:
+            try:
+                requests.post(
+                    f"{BACKEND_URL}/adc_gain",
+                    json={"gain_db_left": analog_gain_db_left, "gain_db_right": analog_gain_db_right},
+                    timeout=1,
+                )
+            except Exception:
+                pass
+        st.session_state['_prev_analog_gain_db_left'] = analog_gain_db_left
+        st.session_state['_prev_analog_gain_db_right'] = analog_gain_db_right
+
+# Audio level monitor (checkbox, not persisted across reloads)
+show_level_monitor = st.checkbox("Audio level monitor", value=False, disabled=not is_streaming,
+                                  help="Show real-time audio level meters for active radios. Only works while streaming.")
+
+if show_level_monitor and is_streaming:
+    @st.fragment(run_every=0.2)
+    def _audio_level_fragment():
+        cols = st.columns(2)
+        # Radio 1
+        with cols[0]:
+            try:
+                r = requests.get(f"{BACKEND_URL}/audio_level", timeout=0.2)
+                levels = r.json().get("levels", []) if r.ok else []
+            except Exception:
+                levels = []
+            if levels:
+                rms = max(levels)
+                db = max(-60.0, 20.0 * (math.log10(rms) if rms > 0 else -3.0))
+                pct = int(max(0, min(100, (db + 60) * 100 / 60)))
+                st.markdown(
+                    f"**Radio 1**"
+                    f'<div style="background:#333;border-radius:4px;height:18px;width:100%;margin-top:4px;">'
+                    f'<div style="background:#2ecc71;height:100%;width:{pct}%;border-radius:4px;transition:width 0.15s;"></div>'
+                    f'</div>',
+                    unsafe_allow_html=True,
+                )
+            else:
+                st.markdown("**Radio 1** &nbsp; --")
+        # Radio 2
+        with cols[1]:
+            try:
+                r2 = requests.get(f"{BACKEND_URL}/audio_level2", timeout=0.2)
+                levels2 = r2.json().get("levels", []) if r2.ok else []
+            except Exception:
+                levels2 = []
+            if levels2:
+                rms2 = max(levels2)
+                db2 = max(-60.0, 20.0 * (math.log10(rms2) if rms2 > 0 else -3.0))
+                pct2 = int(max(0, min(100, (db2 + 60) * 100 / 60)))
+                st.markdown(
+                    f"**Radio 2**"
+                    f'<div style="background:#333;border-radius:4px;height:18px;width:100%;margin-top:4px;">'
+                    f'<div style="background:#2ecc71;height:100%;width:{pct2}%;border-radius:4px;transition:width 0.15s;"></div>'
+                    f'</div>',
+                    unsafe_allow_html=True,
+                )
+            else:
+                st.markdown("**Radio 2** &nbsp; --")
+    _audio_level_fragment()
+
 # Placeholder for validation errors (will be filled in later)
 validation_error_placeholder = st.empty()
 
@@ -322,13 +437,43 @@ else:
                 disabled=is_streaming
             )
 
-            # Use analog-specific defaults (not from saved settings which may have Dante values)
-            default_name = "Analog_Radio_1"
-            default_program_info = "Analog Radio Broadcast"
-            default_lang = "deu"
-
             quality_options = list(QUALITY_MAP.keys())
-            default_quality = "Medium (24kHz)" if "Medium (24kHz)" in quality_options else quality_options[0]
+
+            # Use saved settings if audio_mode matches, otherwise use analog-specific defaults
+            saved_audio_mode = saved_settings.get('audio_mode')
+            if saved_audio_mode == 'Analog':
+                default_name = saved_settings.get('channel_names', ["Analog_Radio_1"])[0]
+                raw_program_info = saved_settings.get('program_info', default_name)
+                if isinstance(raw_program_info, list) and raw_program_info:
+                    default_program_info = raw_program_info[0]
+                else:
+                    default_program_info = raw_program_info
+                default_lang = saved_settings.get('languages', ["deu"])[0]
+
+                # Map saved sampling rate to quality label
+                saved_rate = saved_settings.get('auracast_sampling_rate_hz')
+                if saved_rate == 48000:
+                    default_quality = "High (48kHz)"
+                elif saved_rate == 32000:
+                    default_quality = "Good (32kHz)"
+                elif saved_rate == 24000:
+                    default_quality = "Medium (24kHz)"
+                elif saved_rate == 16000:
+                    default_quality = "Fair (16kHz)"
+                else:
+                    default_quality = "Medium (24kHz)"
+
+                saved_pwd = saved_settings.get('stream_password', '')
+            else:
+                # Use analog-specific defaults when switching from another mode
+                default_name = "Analog_Radio_1"
+                default_program_info = "Analog Radio Broadcast"
+                default_lang = "deu"
+                default_quality = "Medium (24kHz)" if "Medium (24kHz)" in quality_options else quality_options[0]
+                saved_pwd = ''
+
+            if default_quality not in quality_options:
+                default_quality = quality_options[0]
             quality1 = st.selectbox(
                 "Stream Quality (Radio 1)",
                 quality_options,
@@ -339,7 +484,7 @@ else:
 
             stream_passwort1 = st.text_input(
                 "Stream Passwort (Radio 1)",
-                value="",
+                value=saved_pwd,
                 type="password",
                 disabled=is_streaming,
                 help="Optional: Set a broadcast code for Radio 1."
@@ -446,7 +591,10 @@ else:
                             input_device1 = None
                     else:
                         # Mono mode: show all available channels
+                        saved_input_device = saved_settings.get('input_device')
                         default_r1_idx = 0
+                        if saved_input_device in analog_names:
+                            default_r1_idx = analog_names.index(saved_input_device)
                         input_device1 = st.selectbox(
                             "Input Device (Radio 1)",
                             analog_names,
@@ -495,22 +643,53 @@ else:
                 )
 
             if radio2_enabled and not stereo_enabled:
-                # Use analog-specific defaults for Radio 2
+                # Use saved settings if audio_mode matches, otherwise use analog-specific defaults for Radio 2
-                default_name_r2 = "Analog_Radio_2"
+                secondary_settings = saved_settings.get('secondary', {})
-                default_program_info_r2 = "Analog Radio Broadcast"
+                saved_audio_mode = saved_settings.get('audio_mode')
-                default_lang_r2 = "deu"
+                if saved_audio_mode == 'Analog' and secondary_settings:
+                    default_name_r2 = secondary_settings.get('channel_names', ["Analog_Radio_2"])[0] if isinstance(secondary_settings.get('channel_names'), list) else secondary_settings.get('channel_names', "Analog_Radio_2")
+                    raw_program_info_r2 = secondary_settings.get('program_info', default_name_r2)
+                    if isinstance(raw_program_info_r2, list) and raw_program_info_r2:
+                        default_program_info_r2 = raw_program_info_r2[0]
+                    else:
+                        default_program_info_r2 = raw_program_info_r2
+                    default_lang_r2 = secondary_settings.get('languages', ["deu"])[0] if isinstance(secondary_settings.get('languages'), list) else secondary_settings.get('languages', 'deu')
                     
+                    # Map saved sampling rate to quality label
+                    saved_rate_r2 = secondary_settings.get('auracast_sampling_rate_hz')
+                    if saved_rate_r2 == 48000:
+                        default_quality_r2 = "High (48kHz)"
+                    elif saved_rate_r2 == 32000:
+                        default_quality_r2 = "Good (32kHz)"
+                    elif saved_rate_r2 == 24000:
+                        default_quality_r2 = "Medium (24kHz)"
+                    elif saved_rate_r2 == 16000:
+                        default_quality_r2 = "Fair (16kHz)"
+                    else:
+                        default_quality_r2 = "Medium (24kHz)"
+                    
+                    saved_pwd_r2 = secondary_settings.get('stream_password', '')
+                else:
+                    # Use analog-specific defaults when switching from another mode
+                    default_name_r2 = "Analog_Radio_2"
+                    default_program_info_r2 = "Analog Radio Broadcast"
+                    default_lang_r2 = "deu"
+                    default_quality_r2 = "Medium (24kHz)" if "Medium (24kHz)" in quality_options else quality_options[0]
+                    saved_pwd_r2 = ''
+
+                if default_quality_r2 not in quality_options:
+                    default_quality_r2 = quality_options[0]
                 quality2 = st.selectbox(
                     "Stream Quality (Radio 2)",
                     quality_options,
-                    index=quality_options.index(default_quality),
+                    index=quality_options.index(default_quality_r2),
                     disabled=is_streaming,
                     help="Select the audio sampling rate for Radio 2."
                 )
 
                 stream_passwort2 = st.text_input(
                     "Stream Passwort (Radio 2)",
-                    value="",
+                    value=saved_pwd_r2,
                     type="password",
                     disabled=is_streaming,
                     help="Optional: Set a broadcast code for Radio 2."
@@ -571,7 +750,11 @@ else:
 
                 if not is_streaming:
                     if analog_names:
+                        secondary_settings = saved_settings.get('secondary', {})
+                        saved_input_device2 = secondary_settings.get('input_device')
                         default_r2_idx = 1 if len(analog_names) > 1 else 0
+                        if saved_input_device2 in analog_names:
+                            default_r2_idx = analog_names.index(saved_input_device2)
                         input_device2 = st.selectbox(
                             "Input Device (Radio 2)",
                             analog_names,
@@ -602,6 +785,8 @@ else:
                     'immediate_rendering': immediate_rendering2,
                     'presentation_delay_ms': presentation_delay_ms2,
                     'qos_preset': qos_preset2,
+                    'analog_gain_db_left': analog_gain_db_left,
+                    'analog_gain_db_right': analog_gain_db_right,
                 }
 
         radio1_cfg = {
@@ -616,7 +801,9 @@ else:
             'immediate_rendering': immediate_rendering1,
             'presentation_delay_ms': presentation_delay_ms1,
             'qos_preset': qos_preset1,
-            'stereo_mode': stereo_enabled,  # Add stereo mode setting
+            'stereo_mode': stereo_enabled,
+            'analog_gain_db_left': analog_gain_db_left,
+            'analog_gain_db_right': analog_gain_db_right,
         }
 
     if audio_mode == "Network - Dante":
@@ -659,10 +846,15 @@ else:
             )
             
             # Dante stereo mode toggle
-            saved_r1_config = saved_settings.get('dante_radio1', {})
+            saved_audio_mode = saved_settings.get('audio_mode')
+            dante_stereo_enabled = False
+            if saved_audio_mode == 'Network - Dante':
+                # Check if any input device starts with dante_stereo_ to detect stereo mode
+                input_device = saved_settings.get('input_device', '')
+                dante_stereo_enabled = input_device.startswith('dante_stereo_')
             dante_stereo_enabled = st.checkbox(
                 "🎧 Stereo Mode",
-                value=bool(saved_r1_config.get('dante_stereo_mode', False)),
+                value=dante_stereo_enabled,
                 help="Enable stereo streaming for Dante inputs. Select left and right channels from ASRC channels 1-6. Radio 2 and multi-stream configurations will be disabled in stereo mode.",
                 disabled=is_streaming
             )
@@ -675,9 +867,19 @@ else:
                                          "dante_asrc_ch4", "dante_asrc_ch5", "dante_asrc_ch6"]
                 dante_channel_labels = ["CH1", "CH2", "CH3", "CH4", "CH5", "CH6"]
 
+                # Parse saved stereo device name to extract left and right channels
+                input_device = saved_settings.get('input_device', '')
+                saved_left = 'dante_asrc_ch1'
+                saved_right = 'dante_asrc_ch2'
+                if input_device.startswith('dante_stereo_'):
+                    # Format: dante_stereo_<left>_<right>
+                    parts = input_device.split('_')
+                    if len(parts) >= 4:
+                        saved_left = f"dante_asrc_ch{parts[2]}"
+                        saved_right = f"dante_asrc_ch{parts[3]}"
+
                 col_left, col_right = st.columns(2)
                 with col_left:
-                    saved_left = saved_r1_config.get('dante_stereo_left', 'dante_asrc_ch1')
                     left_idx = dante_channel_options.index(saved_left) if saved_left in dante_channel_options else 0
                     dante_left_channel = st.selectbox(
                         "Left Channel",
@@ -688,7 +890,6 @@ else:
                         help="Select the Dante ASRC channel for the left stereo channel"
                     )
                 with col_right:
-                    saved_right = saved_r1_config.get('dante_stereo_right', 'dante_asrc_ch2')
                     right_idx = dante_channel_options.index(saved_right) if saved_right in dante_channel_options else 1
                     dante_right_channel = st.selectbox(
                         "Right Channel",
@@ -706,7 +907,22 @@ else:
             
             # Stream count dropdown for Radio 1 (disabled in stereo mode - forced to 1 stream at 48kHz)
             r1_stream_options = list(dante_stream_options.keys())
-            saved_r1_streams = saved_r1_config.get('stream_config', '1x48')
+            # Infer stream configuration from saved sampling rate
+            saved_rate = saved_settings.get('auracast_sampling_rate_hz')
+            saved_r1_streams = '1 × 48kHz'  # default
+            if saved_rate:
+                if saved_rate == 48000:
+                    channel_names = saved_settings.get('channel_names', [])
+                    if len(channel_names) == 2:
+                        saved_r1_streams = '2 × 24kHz'
+                    elif len(channel_names) == 3:
+                        saved_r1_streams = '3 × 16kHz'
+                    else:
+                        saved_r1_streams = '1 × 48kHz'
+                elif saved_rate == 24000:
+                    saved_r1_streams = '2 × 24kHz'
+                elif saved_rate == 16000:
+                    saved_r1_streams = '3 × 16kHz'
             default_r1_idx = r1_stream_options.index(saved_r1_streams) if saved_r1_streams in r1_stream_options else 0
             
             if dante_stereo_enabled:
@@ -741,7 +957,17 @@ else:
                     (r1_max_quality == "Fair (16kHz)" and quality == "Fair (16kHz)")):
                     r1_available_qualities.append(quality)
 
-            saved_r1_quality = saved_r1_config.get('radio_quality', r1_max_quality)
+            # Map saved sampling rate to quality label
+            saved_r1_quality = r1_max_quality
+            saved_rate = saved_settings.get('auracast_sampling_rate_hz')
+            if saved_rate == 48000:
+                saved_r1_quality = "High (48kHz)"
+            elif saved_rate == 32000:
+                saved_r1_quality = "Good (32kHz)"
+            elif saved_rate == 24000:
+                saved_r1_quality = "Medium (24kHz)"
+            elif saved_rate == 16000:
+                saved_r1_quality = "Fair (16kHz)"
             if saved_r1_quality not in r1_available_qualities:
                 saved_r1_quality = r1_max_quality
 
@@ -760,7 +986,7 @@ else:
             with col_r1_flags1:
                 r1_assisted_listening = st.checkbox(
                     "Assistive (R1)",
-                    value=bool(saved_r1_config.get('assisted_listening', False)),
+                    value=bool(saved_settings.get('assisted_listening_stream', False)),
                     disabled=is_streaming,
                     help="Assistive listening stream"
                 )
@@ -768,13 +994,13 @@ else:
             with col_r1_flags2:
                 r1_immediate_rendering = st.checkbox(
                     "Immediate (R1)",
-                    value=bool(saved_r1_config.get('immediate_rendering', False)),
+                    value=bool(saved_settings.get('immediate_rendering', False)),
                     disabled=is_streaming,
                     help="Ignore presentation delay"
                 )
             
             with col_r1_pdelay:
-                default_pdelay = int(saved_r1_config.get('presentation_delay_us', 40000) or 40000)
+                default_pdelay = int(saved_settings.get('presentation_delay_us', 40000) or 40000)
                 default_pdelay_ms = max(10, min(200, default_pdelay // 1000))
                 r1_presentation_delay_ms = st.number_input(
                     "Delay (ms, R1)",
@@ -785,7 +1011,7 @@ else:
 
             with col_r1_qos:
                 qos_options = list(QOS_PRESET_MAP.keys())
-                saved_qos = saved_r1_config.get('qos_preset', 'Fast')
+                saved_qos = saved_settings.get('qos_preset', 'Fast')
                 default_qos_idx = qos_options.index(saved_qos) if saved_qos in qos_options else 0
                 r1_qos_preset = st.selectbox(
                     "QoS (R1)", options=qos_options, index=default_qos_idx,
@@ -803,8 +1029,15 @@ else:
             if dante_stereo_enabled:
                 # Stereo mode: single stream with combined L+R channels
                 with st.expander("Stereo Stream - Radio 1", expanded=True):
-                    saved_streams = saved_r1_config.get('streams', [])
+                    # Read from flat settings structure
-                    saved_stream = saved_streams[0] if saved_streams else {}
+                    channel_names = saved_settings.get('channel_names', [])
+                    program_infos = saved_settings.get('program_info', [])
+                    languages = saved_settings.get('languages', [])
+
+                    saved_name = channel_names[0] if channel_names else 'Dante_Stereo'
+                    saved_program_info = program_infos[0] if program_infos else saved_name
+                    saved_language = languages[0] if languages else 'eng'
+                    saved_password = saved_settings.get('stream_password', '')
 
                     # First row: Channel name and password
                     col_name, col_pwd = st.columns([2, 1])
@@ -812,7 +1045,7 @@ else:
                     with col_name:
                         stream_name = st.text_input(
                             "Channel Name",
-                            value=saved_stream.get('name', 'Dante_Stereo'),
+                            value=saved_name,
                             disabled=is_streaming,
                             key="r1_stereo_name"
                         )
@@ -820,7 +1053,7 @@ else:
                     with col_pwd:
                         stream_password = st.text_input(
                             "Stream Password",
-                            value=saved_stream.get('stream_password', ''),
+                            value=saved_password,
                             type="password",
                             disabled=is_streaming,
                             key="r1_stereo_password",
@@ -833,7 +1066,7 @@ else:
                     with col_prog:
                         program_info = st.text_input(
                             "Program Info",
-                            value=saved_stream.get('program_info', 'Dante Stereo Broadcast'),
+                            value=saved_program_info,
                             disabled=is_streaming,
                             key="r1_stereo_program"
                         )
@@ -841,7 +1074,7 @@ else:
                     with col_lang_code:
                         language = st.text_input(
                             "Language",
-                            value=saved_stream.get('language', 'eng'),
+                            value=saved_language,
                             disabled=is_streaming,
                             key="r1_stereo_lang",
                             help="ISO 639-3 language code"
@@ -875,10 +1108,21 @@ else:
                     })
             else:
                 # Normal mono mode: multiple streams with individual channels
+                # Read from flat settings structure
+                channel_names = saved_settings.get('channel_names', [])
+                program_infos = saved_settings.get('program_info', [])
+                languages = saved_settings.get('languages', [])
+                input_devices = saved_settings.get('input_devices', [])
+                stream_passwords = saved_settings.get('stream_passwords', []) if 'stream_passwords' in saved_settings else []
+
                 for i in range(r1_num_streams):
                     with st.expander(f"Stream {i+1} - Radio 1", expanded=True):
-                        saved_streams = saved_r1_config.get('streams', [])
+                        # Get saved values from flat structure
-                        saved_stream = saved_streams[i] if i < len(saved_streams) else {}
+                        saved_name = channel_names[i] if i < len(channel_names) else f'Dante_R1_S{i+1}'
+                        saved_program_info = program_infos[i] if i < len(program_infos) else f'Dante Radio 1 Stream {i+1}'
+                        saved_language = languages[i] if i < len(languages) else 'eng'
+                        saved_password = stream_passwords[i] if i < len(stream_passwords) else ''
+                        saved_input_device = input_devices[i] if i < len(input_devices) else None
 
                         # First row: Channel name and language
                         col_name, col_lang = st.columns([2, 1])
@@ -886,7 +1130,7 @@ else:
                         with col_name:
                             stream_name = st.text_input(
                                 f"Channel Name",
-                                value=saved_stream.get('name', f'Dante_R1_S{i+1}'),
+                                value=saved_name,
                                 disabled=is_streaming,
                                 key=f"r1_stream_{i}_name"
                             )
@@ -894,7 +1138,7 @@ else:
                         with col_lang:
                             stream_password = st.text_input(
                                 f"Stream Password",
-                                value=saved_stream.get('stream_password', ''),
+                                value=saved_password,
                                 type="password",
                                 disabled=is_streaming,
                                 key=f"r1_stream_{i}_password",
@@ -907,7 +1151,7 @@ else:
                         with col_prog:
                             program_info = st.text_input(
                                 f"Program Info",
-                                value=saved_stream.get('program_info', f'Dante Radio 1 Stream {i+1}'),
+                                value=saved_program_info,
                                 disabled=is_streaming,
                                 key=f"r1_stream_{i}_program"
                             )
@@ -915,7 +1159,7 @@ else:
                         with col_lang_code:
                             language = st.text_input(
                                 f"Language",
-                                value=saved_stream.get('language', 'eng'),
+                                value=saved_language,
                                 disabled=is_streaming,
                                 key=f"r1_stream_{i}_lang",
                                 help="ISO 639-3 language code"
@@ -930,7 +1174,7 @@ else:
 
                             if not is_streaming and input_options:
                                 # Get default from session state first, then from saved settings
-                                default_input_name = st.session_state.get(device_session_key, saved_stream.get('input_device'))
+                                default_input_name = st.session_state.get(device_session_key, saved_input_device)
                                 default_input_label = None
                                 for label, name in option_name_map.items():
                                     if name == default_input_name:
@@ -951,7 +1195,7 @@ else:
                                 st.session_state[device_session_key] = input_device
                             else:
                                 # When streaming, get the device from session state
-                                current_device = st.session_state.get(device_session_key, saved_stream.get('input_device', 'No device'))
+                                current_device = st.session_state.get(device_session_key, saved_input_device or 'No device')
                                 
                                 # Convert internal name to display label
                                 display_label = current_device
@@ -982,13 +1226,17 @@ else:
             st.subheader("Radio 2")
 
             # Disable Radio 2 in stereo mode
-            saved_r2_config = saved_settings.get('dante_radio2', {})
+            secondary_settings = saved_settings.get('secondary', {})
             if dante_stereo_enabled:
                 st.info("🎧 Radio 2 is automatically disabled in stereo mode")
                 radio2_enabled = False
             else:
                 # Enable/disable checkbox for Radio 2
+                # Use saved settings or streaming state to determine default
                 radio2_enabled_default = secondary_is_streaming
+                # Check if secondary radio has saved settings (indicates it was enabled)
+                if secondary_settings.get('auracast_sampling_rate_hz') or secondary_settings.get('channel_names'):
+                    radio2_enabled_default = True
                 radio2_enabled = st.checkbox(
                     "Enable Radio 2",
                     value=radio2_enabled_default,
@@ -999,7 +1247,22 @@ else:
             if radio2_enabled:
                 # Stream count dropdown for Radio 2
                 r2_stream_options = r1_stream_options
-                saved_r2_streams = saved_r2_config.get('stream_config', '1x48')
+                # Infer stream configuration from saved secondary sampling rate
+                saved_rate2 = secondary_settings.get('auracast_sampling_rate_hz')
+                saved_r2_streams = '1 × 48kHz'  # default
+                if saved_rate2:
+                    if saved_rate2 == 48000:
+                        channel_names2 = secondary_settings.get('channel_names', [])
+                        if len(channel_names2) == 2:
+                            saved_r2_streams = '2 × 24kHz'
+                        elif len(channel_names2) == 3:
+                            saved_r2_streams = '3 × 16kHz'
+                        else:
+                            saved_r2_streams = '1 × 48kHz'
+                    elif saved_rate2 == 24000:
+                        saved_r2_streams = '2 × 24kHz'
+                    elif saved_rate2 == 16000:
+                        saved_r2_streams = '3 × 16kHz'
                 default_r2_idx = r2_stream_options.index(saved_r2_streams) if saved_r2_streams in r2_stream_options else 0
                 
                 r2_stream_config = st.selectbox(
@@ -1022,7 +1285,16 @@ else:
                         (r2_max_quality == "Fair (16kHz)" and quality == "Fair (16kHz)")):
                         r2_available_qualities.append(quality)
 
-                saved_r2_quality = saved_r2_config.get('radio_quality', r2_max_quality)
+                # Map saved secondary sampling rate to quality label
+                saved_r2_quality = r2_max_quality
+                if saved_rate2 == 48000:
+                    saved_r2_quality = "High (48kHz)"
+                elif saved_rate2 == 32000:
+                    saved_r2_quality = "Good (32kHz)"
+                elif saved_rate2 == 24000:
+                    saved_r2_quality = "Medium (24kHz)"
+                elif saved_rate2 == 16000:
+                    saved_r2_quality = "Fair (16kHz)"
                 if saved_r2_quality not in r2_available_qualities:
                     saved_r2_quality = r2_max_quality
 
@@ -1035,13 +1307,12 @@ else:
                 )
 
                 # Radio-level settings for Radio 2
-                # First row: Assistive listening, immediate rendering, presentation delay, QoS
                 col_r2_flags1, col_r2_flags2, col_r2_pdelay, col_r2_qos = st.columns([1, 1, 0.7, 0.6], gap="small")
 
                 with col_r2_flags1:
                     r2_assisted_listening = st.checkbox(
                         "Assistive (R2)",
-                        value=bool(saved_r2_config.get('assisted_listening', False)),
+                        value=bool(secondary_settings.get('assisted_listening_stream', False)),
                         disabled=is_streaming,
                         help="Assistive listening stream"
                     )
@@ -1049,13 +1320,13 @@ else:
                 with col_r2_flags2:
                     r2_immediate_rendering = st.checkbox(
                         "Immediate (R2)",
-                        value=bool(saved_r2_config.get('immediate_rendering', False)),
+                        value=bool(secondary_settings.get('immediate_rendering', False)),
                         disabled=is_streaming,
                         help="Ignore presentation delay"
                     )
 
                 with col_r2_pdelay:
-                    default_pdelay = int(saved_r2_config.get('presentation_delay_us', 40000) or 40000)
+                    default_pdelay = int(secondary_settings.get('presentation_delay_us', 40000) or 40000)
                     default_pdelay_ms = max(10, min(200, default_pdelay // 1000))
                     r2_presentation_delay_ms = st.number_input(
                         "Delay (ms, R2)",
@@ -1066,10 +1337,10 @@ else:
 
                 with col_r2_qos:
                     qos_options = list(QOS_PRESET_MAP.keys())
-                    saved_qos = saved_r2_config.get('qos_preset', 'Fast')
+                    saved_qos = secondary_settings.get('qos_preset', 'Fast')
-                    default_qos_idx = qos_options.index(saved_qos) if saved_qos in qos_options else 0
+                    default_qos_idx2 = qos_options.index(saved_qos) if saved_qos in qos_options else 0
                     r2_qos_preset = st.selectbox(
-                        "QoS (R2)", options=qos_options, index=default_qos_idx,
+                        "QoS (R2)", options=qos_options, index=default_qos_idx2,
                         disabled=is_streaming,
                         help="Quality of Service preset for Radio 2"
                     )
@@ -1078,10 +1349,21 @@ else:
                 st.write("**Stream Configuration (Radio 2)**")
                 r2_streams = []
 
+                # Read from flat secondary settings structure
+                channel_names2 = secondary_settings.get('channel_names', [])
+                program_infos2 = secondary_settings.get('program_info', [])
+                languages2 = secondary_settings.get('languages', [])
+                input_devices2 = secondary_settings.get('input_devices', [])
+                stream_passwords2 = secondary_settings.get('stream_passwords', []) if 'stream_passwords' in secondary_settings else []
+
                 for i in range(r2_num_streams):
                     with st.expander(f"Stream {i+1} - Radio 2", expanded=True):
-                        saved_streams = saved_r2_config.get('streams', [])
+                        # Get saved values from flat secondary structure
-                        saved_stream = saved_streams[i] if i < len(saved_streams) else {}
+                        saved_name2 = channel_names2[i] if i < len(channel_names2) else f'Dante_R2_S{i+1}'
+                        saved_program_info2 = program_infos2[i] if i < len(program_infos2) else f'Dante Radio 2 Stream {i+1}'
+                        saved_language2 = languages2[i] if i < len(languages2) else 'eng'
+                        saved_password2 = stream_passwords2[i] if i < len(stream_passwords2) else ''
+                        saved_input_device2 = input_devices2[i] if i < len(input_devices2) else None
 
                         # First row: Channel name and password
                         col_name, col_pwd = st.columns([2, 1])
@@ -1089,7 +1371,7 @@ else:
                         with col_name:
                             stream_name = st.text_input(
                                 f"Channel Name",
-                                value=saved_stream.get('name', f'Dante_R2_S{i+1}'),
+                                value=saved_name2,
                                 disabled=is_streaming,
                                 key=f"r2_stream_{i}_name"
                             )
@@ -1097,7 +1379,7 @@ else:
                         with col_pwd:
                             stream_password = st.text_input(
                                 f"Stream Password",
-                                value=saved_stream.get('stream_password', ''),
+                                value=saved_password2,
                                 type="password",
                                 disabled=is_streaming,
                                 key=f"r2_stream_{i}_password",
@@ -1110,7 +1392,7 @@ else:
                         with col_prog:
                             program_info = st.text_input(
                                 f"Program Info",
-                                value=saved_stream.get('program_info', f'Dante Radio 2 Stream {i+1}'),
+                                value=saved_program_info2,
                                 disabled=is_streaming,
                                 key=f"r2_stream_{i}_program"
                             )
@@ -1118,7 +1400,7 @@ else:
                         with col_lang:
                             language = st.text_input(
                                 f"Language",
-                                value=saved_stream.get('language', 'eng'),
+                                value=saved_language2,
                                 disabled=is_streaming,
                                 key=f"r2_stream_{i}_lang",
                                 help="ISO 639-3 language code"
@@ -1133,7 +1415,7 @@ else:
 
                             if not is_streaming and input_options:
                                 # Get default from session state first, then from saved settings
-                                default_input_name = st.session_state.get(device_session_key, saved_stream.get('input_device'))
+                                default_input_name = st.session_state.get(device_session_key, saved_input_device2)
                                 default_input_label = None
                                 for label, name in option_name_map.items():
                                     if name == default_input_name:
@@ -1154,7 +1436,7 @@ else:
                                 st.session_state[device_session_key] = input_device
                             else:
                                 # When streaming, get the device from session state
-                                current_device = st.session_state.get(device_session_key, saved_stream.get('input_device', 'No device'))
+                                current_device = st.session_state.get(device_session_key, saved_input_device2 or 'No device')
                                 
                                 # Convert internal name to display label
                                 display_label = current_device
@@ -1239,8 +1521,30 @@ else:
         
     if audio_mode in ("USB", "Network"):
         # USB/Network: single set of controls shared with the single channel
+        # Use saved settings if audio_mode matches, otherwise use defaults
+        saved_audio_mode = saved_settings.get('audio_mode')
+        if saved_audio_mode in ("USB", "Network"):
+            # Map saved sampling rate to quality label
+            saved_rate = saved_settings.get('auracast_sampling_rate_hz')
+            if saved_rate == 48000:
+                default_quality = "High (48kHz)"
+            elif saved_rate == 32000:
+                default_quality = "Good (32kHz)"
+            elif saved_rate == 24000:
+                default_quality = "Medium (24kHz)"
+            elif saved_rate == 16000:
+                default_quality = "Fair (16kHz)"
+            else:
+                default_quality = "Medium (24kHz)"
+            saved_pwd = saved_settings.get('stream_password', '')
+        else:
+            # Use defaults when switching from another mode
+            default_quality = "Medium (24kHz)" if "Medium (24kHz)" in quality_options else quality_options[0]
+            saved_pwd = ''
+
         quality_options = list(QUALITY_MAP.keys())
-        default_quality = "Medium (24kHz)" if "Medium (24kHz)" in quality_options else quality_options[0]
+        if default_quality not in quality_options:
+            default_quality = quality_options[0]
         quality = st.selectbox(
             "Stream Quality (Sampling Rate)",
             quality_options,
@@ -1251,7 +1555,7 @@ else:
 
         stream_passwort = st.text_input(
             "Stream Passwort",
-            value="",
+            value=saved_pwd,
             type="password",
             disabled=is_streaming,
             help="Optional: Set a broadcast code to protect your stream. Leave empty for an open (uncoded) broadcast."
@@ -1499,10 +1803,11 @@ if start_stream:
                 immediate_rendering=bool(cfg['immediate_rendering']),
                 presentation_delay_us=int(cfg['presentation_delay_ms'] * 1000),
                 qos_config=QOS_PRESET_MAP[cfg['qos_preset']],
+                analog_gain_db_left=cfg.get('analog_gain_db_left', 0.0),
+                analog_gain_db_right=cfg.get('analog_gain_db_right', 0.0),
                 bigs=[
                     auracast_config.AuracastBigConfig(
-                        id=cfg.get('id', 123456),
+                        code=((cfg['stream_passwort'] or '').strip() or None),
-                        code=(cfg['stream_passwort'].strip() or None),
                         name=cfg['name'],
                         program_info=cfg['program_info'],
                         language=cfg['language'],
@@ -1555,8 +1860,6 @@ if start_stream:
                 if not stream.get('input_device'):
                     continue
                 
-                stream_id = radio_id * 1000 + i + 1  # Unique ID per stream
-                
                 # Check if this specific stream uses stereo (dante_stereo_X_Y device)
                 input_device = stream['input_device']
                 stream_is_stereo = is_stereo_mode or input_device.startswith('dante_stereo_')
@@ -1564,7 +1867,6 @@ if start_stream:
                 num_channels = 2 if stream_is_stereo else 1
                 
                 bigs.append(auracast_config.AuracastBigConfig(
-                    id=stream_id,
                     code=(stream.get('stream_password', '').strip() or None),
                     name=stream['name'],
                     program_info=stream['program_info'],
@@ -1668,6 +1970,20 @@ if is_started or is_stopped:
 ############################
 with st.expander("System control", expanded=False):
 
+    st.subheader("Status LED")
+    led_enabled_current = bool(saved_settings.get("led_enabled", True))
+    led_enabled = st.checkbox(
+        "Blue LED on while transmitting",
+        value=led_enabled_current,
+        help="When enabled, the blue LED on GPIO pin 12 lights up while the stream is active."
+    )
+    if led_enabled != led_enabled_current:
+        try:
+            requests.post(f"{BACKEND_URL}/set_led_enabled", json={"led_enabled": led_enabled}, timeout=2)
+        except Exception as e:
+            st.error(f"Failed to update LED setting: {e}")
+        st.rerun()
+
     st.subheader("System temperatures")
     temp_col1, temp_col2, temp_col3 = st.columns([1, 1, 1])
     with temp_col1:
@@ -1682,6 +1998,123 @@ with st.expander("System control", expanded=False):
     except Exception as e:
         st.warning(f"Could not read temperatures: {e}")
 
+    st.subheader("Network Information")
+    try:
+        import subprocess, socket
+        device_hostname = socket.gethostname()
+        st.write(f"Hostname: **{device_hostname}**")
+        
+        network_info_resp = requests.get(f"{BACKEND_URL}/network_info", timeout=5)
+        if network_info_resp.status_code == 200:
+            network_data = network_info_resp.json()
+            interfaces = network_data.get("interfaces", {})
+            port_mapping = network_data.get("port_mapping", {})
+            
+            for port_name in ["port1", "port2"]:
+                if port_name not in port_mapping:
+                    continue
+                
+                interface_name = port_mapping[port_name]
+                interface_data = interfaces.get(interface_name, {})
+                
+                port_label = "Port 1" if port_name == "port1" else "Port 2"
+                st.markdown(f"### {port_label}")
+                
+                ip_address = interface_data.get("ip_address", "N/A")
+                is_dhcp = interface_data.get("is_dhcp", True)
+                
+                st.write(f"Interface: **{interface_name}**")
+                st.write(f"IP Address: **{ip_address}**")
+                
+                col1, col2 = st.columns([1, 3])
+                with col1:
+                    toggle_key = f"{port_name}_dhcp_toggle"
+                    current_mode = "DHCP" if is_dhcp else "Static IP"
+                    new_mode = st.radio(
+                        "Mode",
+                        options=["DHCP", "Static IP"],
+                        index=0 if is_dhcp else 1,
+                        key=toggle_key,
+                        horizontal=True
+                    )
+                
+                with col2:
+                    if new_mode == "Static IP":
+                        ip_input_key = f"{port_name}_ip_input"
+                        default_ip = ip_address if ip_address != "N/A" and not is_dhcp else ""
+                        new_ip = st.text_input(
+                            "Static IP Address",
+                            value=default_ip,
+                            key=ip_input_key,
+                            placeholder="192.168.1.100"
+                        )
+                        
+                        if st.button(f"Apply", key=f"{port_name}_apply_btn"):
+                            if not new_ip:
+                                st.error("Please enter an IP address")
+                            else:
+                                import re
+                                ip_pattern = re.compile(r'^(\d{1,3}\.){3}\d{1,3}$')
+                                if not ip_pattern.match(new_ip):
+                                    st.error("Invalid IP address format")
+                                else:
+                                    octets = new_ip.split('.')
+                                    if not all(0 <= int(octet) <= 255 for octet in octets):
+                                        st.error("IP address octets must be between 0 and 255")
+                                    else:
+                                        try:
+                                            config_payload = {
+                                                "interface": interface_name,
+                                                "is_dhcp": False,
+                                                "ip_address": new_ip,
+                                                "netmask": "24"
+                                            }
+                                            config_resp = requests.post(
+                                                f"{BACKEND_URL}/set_network_config",
+                                                json=config_payload,
+                                                timeout=10
+                                            )
+                                            if config_resp.status_code == 200:
+                                                st.success(f"Static IP {new_ip} applied to {interface_name}")
+                                                time.sleep(2)
+                                                st.rerun()
+                                            else:
+                                                st.error(f"Failed to apply configuration: {config_resp.text}")
+                                        except Exception as e:
+                                            st.error(f"Error applying configuration: {e}")
+                    else:
+                        if new_mode != current_mode:
+                            if st.button(f"Apply DHCP", key=f"{port_name}_dhcp_apply_btn"):
+                                try:
+                                    config_payload = {
+                                        "interface": interface_name,
+                                        "is_dhcp": True
+                                    }
+                                    config_resp = requests.post(
+                                        f"{BACKEND_URL}/set_network_config",
+                                        json=config_payload,
+                                        timeout=10
+                                    )
+                                    if config_resp.status_code == 200:
+                                        st.success(f"DHCP enabled for {interface_name}")
+                                        time.sleep(2)
+                                        st.rerun()
+                                    else:
+                                        st.error(f"Failed to apply configuration: {config_resp.text}")
+                                except Exception as e:
+                                    st.error(f"Error applying configuration: {e}")
+                
+                st.markdown("---")
+        else:
+            result = subprocess.run(["hostname", "-I"], capture_output=True, text=True, timeout=2)
+            ips = [ip for ip in result.stdout.strip().split() if not ip.startswith('127.') and ':' not in ip]
+            if ips:
+                st.write(f"IP Address: **{ips[0]}**")
+            else:
+                st.warning("No valid IP address found.")
+    except Exception as e:
+        st.warning(f"Could not determine network info: {e}")
+
     st.subheader("CA Certificate")
     st.caption("Download the CA certificate to trust this device's HTTPS connection.")
     try:
@@ -1842,7 +2275,7 @@ with st.expander("Record", expanded=False):
         selected_device_name = None
     
     # Recording controls
-    col_record, col_download = st.columns([1, 1])
+    col_record, col_download, col_delete = st.columns([1, 1, 1])
     
     with col_record:
         if st.button("Start Recording (5s)", disabled=not selected_device_name):
@@ -1880,6 +2313,22 @@ with st.expander("Record", expanded=False):
         else:
             st.button("Download Last Recording", disabled=True, help="No recording available yet")
     
+    with col_delete:
+        if st.button("Delete Recordings", type="secondary"):
+            try:
+                r = requests.delete(f"{BACKEND_URL}/delete_recordings", timeout=10)
+                if r.ok:
+                    result = r.json()
+                    if result.get('success'):
+                        st.success(f"Deleted {result.get('deleted_count', 0)} recording(s)")
+                        st.session_state['last_recording'] = None
+                    else:
+                        st.error("Failed to delete recordings")
+                else:
+                    st.error(f"Failed to delete recordings: {r.status_code}")
+            except Exception as e:
+                st.error(f"Error deleting recordings: {e}")
+
 log.basicConfig(
     level=os.environ.get('LOG_LEVEL', log.DEBUG),
     format='%(module)s.py:%(lineno)d %(levelname)s: %(message)s'

src/auracast/server/multicast_server.py

@@ -3,12 +3,14 @@ TODO: in the future the multicaster objects should run in their own threads or e
 
 """
 import os
+import re
 import logging as log
 import json
 from datetime import datetime
 import asyncio
 import random
 import subprocess
+import threading
 from dotenv import load_dotenv
 
 from fastapi import FastAPI, HTTPException
@@ -26,6 +28,57 @@ from auracast.utils.sounddevice_utils import (
 )
 
 load_dotenv()
+
+# Blue LED on GPIO pin 12 (BCM) – turns on while transmitting
+LED_PIN = 12
+try:
+    import RPi.GPIO as _GPIO
+    _GPIO.setmode(_GPIO.BCM)
+    _GPIO.setup(LED_PIN, _GPIO.OUT)
+    _GPIO_AVAILABLE = True
+except Exception:
+    _GPIO_AVAILABLE = False
+    _GPIO = None  # type: ignore
+
+_LED_ENABLED: bool = True  # toggled via /set_led_enabled
+_LED_SETTINGS_FILE = os.path.join(os.path.dirname(__file__), 'led_settings.json')
+
+def _load_led_settings() -> None:
+    global _LED_ENABLED
+    try:
+        if os.path.exists(_LED_SETTINGS_FILE):
+            with open(_LED_SETTINGS_FILE, 'r', encoding='utf-8') as f:
+                data = json.load(f)
+            _LED_ENABLED = bool(data.get('led_enabled', True))
+    except Exception:
+        _LED_ENABLED = True
+
+def _save_led_settings() -> None:
+    try:
+        os.makedirs(os.path.dirname(_LED_SETTINGS_FILE), exist_ok=True)
+        with open(_LED_SETTINGS_FILE, 'w', encoding='utf-8') as f:
+            json.dump({'led_enabled': _LED_ENABLED}, f)
+    except Exception:
+        pass
+
+def _led_on():
+    if _GPIO_AVAILABLE and _LED_ENABLED:
+        try:
+            _GPIO.output(LED_PIN, _GPIO.LOW)
+        except Exception:
+            pass
+
+def _led_off():
+    if _GPIO_AVAILABLE:
+        try:
+            _GPIO.output(LED_PIN, _GPIO.HIGH)
+        except Exception:
+            pass
+
+
+# Configure bumble debug logging
+# log.getLogger('bumble').setLevel(log.DEBUG)
+
 # make sure pipewire sets latency
 # Primary and secondary persisted settings files
 STREAM_SETTINGS_FILE1 = os.path.join(os.path.dirname(__file__), 'stream_settings.json')
@@ -133,6 +186,10 @@ def save_settings(persisted: dict, secondary: bool = False) -> None:
 def gen_random_add() -> str:
     return ':'.join(['%02X' % random.randint(0, 255) for _ in range(6)])
 
+def gen_random_broadcast_id() -> int:
+    """Generate a random 24-bit Broadcast ID (1..0xFFFFFF)."""
+    return random.randint(1, 0xFFFFFF)
+
 app = FastAPI()
 
 # Allow CORS for frontend on localhost
@@ -152,6 +209,28 @@ multicaster1: multicast_control.Multicaster | None = None
 multicaster2: multicast_control.Multicaster | None = None
 _stream_lock = asyncio.Lock()  # serialize initialize/stop_audio on API side
 
+# BLE / audio event loop – set in __main__ before uvicorn starts.
+# All coroutines that touch Bumble objects or the audio pipeline MUST run
+# on this loop.  HTTP handlers call _on_ble_loop() to cross into it.
+_ble_loop: asyncio.AbstractEventLoop | None = None
+
+
+async def _on_ble_loop(coro):
+    """Submit *coro* to the BLE event loop and await the result.
+
+    Called from uvicorn's event loop.  Bridges HTTP handler coroutines into
+    the isolated BLE loop so that serial I/O (serial_asyncio / HCI) and the
+    audio pipeline are never preempted by HTTP accept/read/write callbacks.
+
+    asyncio.run_coroutine_threadsafe() schedules the coroutine on _ble_loop
+    (thread-safe), returning a concurrent.futures.Future.
+    asyncio.wrap_future() adapts that into an asyncio.Future so the caller
+    can simply `await` it inside uvicorn's loop.
+    """
+    assert _ble_loop is not None, "BLE loop not yet initialised"
+    future = asyncio.run_coroutine_threadsafe(coro, _ble_loop)
+    return await asyncio.wrap_future(future)
+
 
 async def _init_i2c_on_startup() -> None:
     # Ensure i2c-dev kernel module is loaded (required for /dev/i2c-* access)
@@ -238,12 +317,18 @@ async def _init_i2c_on_startup() -> None:
             log.warning("Exception running i2cget (%s): %s", " ".join(read_cmd), e, exc_info=True)
 
 
-async def _set_adc_level_on_startup() -> None:
+async def _set_adc_level(gain_db_left: float = 0.0, gain_db_right: float = 0.0) -> None:
-    """Ensure ADC mixer level is set at startup.
+    """Set ADC mixer gain in dB for left and right channels independently.
 
-    Runs: amixer -c 2 set 'ADC' x%
+    Runs: amixer -c 2 sset ADC {gain_db_left}dB,{gain_db_right}dB
+    
+    Args:
+        gain_db_left: Left channel gain in dB (-12 to 18), default 0
+        gain_db_right: Right channel gain in dB (-12 to 18), default 0
     """
-    cmd = ["amixer", "-c", "2", "set", "ADC", "80%"]
+    gain_db_left = max(-12.0, min(18.0, gain_db_left))
+    gain_db_right = max(-12.0, min(18.0, gain_db_right))
+    cmd = ["amixer", "-c", "2", "sset", "ADC", "--", f"{int(gain_db_left)}dB,{int(gain_db_right)}dB"]
     try:
         proc = await asyncio.create_subprocess_exec(
             *cmd,
@@ -252,15 +337,46 @@ async def _set_adc_level_on_startup() -> None:
         )
         stdout, stderr = await proc.communicate()
         if proc.returncode != 0:
-            log.warning(
+            log.error(
                 "amixer ADC level command failed (rc=%s): %s",
                 proc.returncode,
                 (stderr or b"" ).decode(errors="ignore").strip(),
             )
         else:
             log.info("amixer ADC level set successfully: %s", (stdout or b"" ).decode(errors="ignore").strip())
+            read_proc = await asyncio.create_subprocess_exec(
+                "amixer", "-c", "2", "sget", "ADC",
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE,
+            )
+            read_stdout, read_stderr = await read_proc.communicate()
+            if read_proc.returncode != 0:
+                log.error(
+                    "amixer ADC sget failed (rc=%s): %s",
+                    read_proc.returncode,
+                    (read_stderr or b"").decode(errors="ignore").strip(),
+                )
+            else:
+                sget_output = (read_stdout or b"").decode(errors="ignore")
+                actual = {}
+                for line in sget_output.splitlines():
+                    for ch_key, ch_name in (("left", "Front Left"), ("right", "Front Right")):
+                        if ch_name in line:
+                            m = re.search(r'\[(-?\d+(?:\.\d+)?)dB\]', line)
+                            if m:
+                                actual[ch_key] = round(float(m.group(1)))
+                expected_left = int(gain_db_left)
+                expected_right = int(gain_db_right)
+                if actual.get("left") != expected_left or actual.get("right") != expected_right:
+                    mismatch = (
+                        f"ADC level mismatch after set: expected L={expected_left}dB R={expected_right}dB, "
+                        f"got L={actual.get('left')}dB R={actual.get('right')}dB"
+                    )
+                    log.error(mismatch)
+                else:
+                    log.info("ADC level set successfully: L=%sdB R=%sdB", expected_left, expected_right)
     except Exception as e:
-        log.warning("Exception running amixer ADC level command: %s", e, exc_info=True)
+        log.error("Exception running amixer ADC level command: %s", e, exc_info=True)
 
 
 async def _stop_all() -> bool:
@@ -280,6 +396,7 @@ async def _stop_all() -> bool:
             was_running = True
         finally:
             multicaster2 = None
+    _led_off()
     return was_running
 
 async def _status_primary() -> dict:
@@ -328,6 +445,11 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
         first_source = conf.bigs[0].audio_source if conf.bigs else ''
         input_device_name = None
         audio_mode_persist = 'Demo'
+        # Capture original per-BIG device names before transformation
+        original_input_devices = [
+            big.audio_source.split(':', 1)[1] if (isinstance(big.audio_source, str) and big.audio_source.startswith('device:')) else None
+            for big in conf.bigs
+        ]
         if any(isinstance(b.audio_source, str) and b.audio_source.startswith('device:') for b in conf.bigs):
             if isinstance(first_source, str) and first_source.startswith('device:'):
                 input_device_name = first_source.split(':', 1)[1] if ':' in first_source else None
@@ -338,6 +460,10 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
 
             if input_device_name in ('ch1', 'ch2'):
                 audio_mode_persist = 'Analog'
+                # Set ADC gain level for analog mode
+                analog_gain_db_left = getattr(conf, 'analog_gain_db_left', 0.0)
+                analog_gain_db_right = getattr(conf, 'analog_gain_db_right', 0.0)
+                await _set_adc_level(analog_gain_db_left, analog_gain_db_right)
             elif input_device_name in dante_channels:
                 audio_mode_persist = 'Network - Dante'
             else:
@@ -380,18 +506,15 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
                     if is_stereo and sel == 'ch1':
                         # Stereo mode: use ALSA directly to capture both channels from hardware
                         # ch1=left (channel 0), ch2=right (channel 1)
-                        big.audio_source = 'alsa:hw:CARD=i2s,DEV=0'
+                        big.audio_source = 'device:hw:2'
                         big.input_format = f"int16le,{hardware_capture_rate},2"
                         log.info("Configured analog stereo input: using ALSA hw:CARD=i2s,DEV=0 with ch1=left, ch2=right")
                     elif is_stereo and sel == 'ch2':
                         # Skip ch2 in stereo mode as it's already captured as part of stereo pair
                         continue
                     else:
-                        # Mono mode: individual channel capture
+                        # Mono mode: use dsnoop virtual device directly (ch1=left, ch2=right)
-                        device_index = resolve_input_device_index(sel)
+                        big.audio_source = f'device:{sel}'
-                        if device_index is None:
-                            raise HTTPException(status_code=400, detail=f"Audio device '{sel}' not found.")
-                        big.audio_source = f'device:{device_index}'
                         big.input_format = f"int16le,{hardware_capture_rate},1"
                     continue
 
@@ -447,10 +570,12 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
 
         conf.qos_config.max_transport_latency_ms = int(conf.qos_config.number_of_retransmissions) * 10 + 3
 
-        # Only generate a new random_address if the BIG is still at the model default.
+        # Generate fresh random_address and broadcast ID for any BIG still at model defaults.
         for big in conf.bigs:
             if not getattr(big, 'random_address', None) or big.random_address == DEFAULT_RANDOM_ADDRESS:
                 big.random_address = gen_random_add()
+            if big.id == DEFAULT_BIG_ID:
+                big.id = gen_random_broadcast_id()
 
         # Log the final, fully-updated configuration just before creating the Multicaster
         log.info('Final multicaster config (transport=%s):\n %s', transport, conf.model_dump_json(indent=2))
@@ -461,6 +586,7 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
         auto_started = False
         if any(isinstance(big.audio_source, str) and (big.audio_source.startswith("device:") or big.audio_source.startswith("alsa:") or big.audio_source.startswith("file:")) for big in conf.bigs):
             await mc.start_streaming()
+            _led_on()
             auto_started = True
 
         demo_count = sum(1 for big in conf.bigs if isinstance(big.audio_source, str) and big.audio_source.startswith('file:'))
@@ -476,6 +602,7 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
             'languages': [big.language for big in conf.bigs],
             'audio_mode': audio_mode_persist,
             'input_device': input_device_name,
+            'input_devices': original_input_devices,
             'program_info': [getattr(big, 'program_info', None) for big in conf.bigs],
             'gain': [getattr(big, 'input_gain', 1.0) for big in conf.bigs],
             'auracast_sampling_rate_hz': conf.auracast_sampling_rate_hz,
@@ -485,6 +612,8 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
             'immediate_rendering': getattr(conf, 'immediate_rendering', False),
             'assisted_listening_stream': getattr(conf, 'assisted_listening_stream', False),
             'analog_stereo_mode': getattr(conf.bigs[0], 'analog_stereo_mode', False) if conf.bigs else False,
+            'analog_gain_db_left': getattr(conf, 'analog_gain_db_left', 0.0),
+            'analog_gain_db_right': getattr(conf, 'analog_gain_db_right', 0.0),
             'stream_password': (conf.bigs[0].code if conf.bigs and getattr(conf.bigs[0], 'code', None) else None),
             'big_ids': [getattr(big, 'id', DEFAULT_BIG_ID) for big in conf.bigs],
             'big_random_addresses': [getattr(big, 'random_address', DEFAULT_RANDOM_ADDRESS) for big in conf.bigs],
@@ -502,7 +631,10 @@ async def init_radio(transport: str, conf: auracast_config.AuracastConfigGroup,
 
 @app.post("/init")
 async def initialize(conf: auracast_config.AuracastConfigGroup):
-    """Initializes the primary broadcaster on the streamer thread."""
+    """Initializes the primary broadcaster on the BLE loop."""
+    return await _on_ble_loop(_initialize_impl(conf))
+
+async def _initialize_impl(conf: auracast_config.AuracastConfigGroup):
     async with _stream_lock:
         global multicaster1, global_config_group
         mc, persisted = await init_radio(TRANSPORT1, conf, multicaster1)
@@ -512,16 +644,33 @@ async def initialize(conf: auracast_config.AuracastConfigGroup):
 
 @app.post("/init2")
 async def initialize2(conf: auracast_config.AuracastConfigGroup):
-    """Initializes the secondary broadcaster on the streamer thread."""
+    """Initializes the secondary broadcaster on the BLE loop."""
+    return await _on_ble_loop(_initialize2_impl(conf))
+
+async def _initialize2_impl(conf: auracast_config.AuracastConfigGroup):
     async with _stream_lock:
         global multicaster2
         mc, persisted = await init_radio(TRANSPORT2, conf, multicaster2)
         multicaster2 = mc
         save_settings(persisted, secondary=True)
 
+@app.post("/set_led_enabled")
+async def set_led_enabled(body: dict):
+    """Enable or disable the blue status LED. Persisted across restarts."""
+    global _LED_ENABLED
+    _LED_ENABLED = bool(body.get("led_enabled", True))
+    _save_led_settings()
+    if not _LED_ENABLED:
+        _led_off()
+    return {"led_enabled": _LED_ENABLED}
+
 @app.post("/stop_audio")
 async def stop_audio():
-    """Stops streaming on both multicaster1 and multicaster2 (worker thread)."""
+    """Stops streaming on both multicasters via the BLE loop."""
+    return await _on_ble_loop(_stop_audio_impl())
+
+async def _stop_audio_impl():
+    """Runs on BLE loop: stops all streamers and persists is_streaming=False."""
     try:
         was_running = await _stop_all()
 
@@ -547,11 +696,33 @@ async def stop_audio():
         log.error("Exception in /stop_audio: %s", traceback.format_exc())
         raise HTTPException(status_code=500, detail=str(e))
 
+@app.post("/adc_gain")
+async def set_adc_gain(payload: dict):
+    """Set ADC gain in dB for left and right channels without restarting the stream.
+
+    Body: {"gain_db_left": float, "gain_db_right": float}
+    """
+    try:
+        gain_db_left = float(payload.get("gain_db_left", 0.0))
+        gain_db_right = float(payload.get("gain_db_right", 0.0))
+        await _set_adc_level(gain_db_left, gain_db_right)
+        # Persist the new values so they survive a restart
+        for load_fn, save_fn in [(load_stream_settings, save_stream_settings), (load_stream_settings2, save_stream_settings2)]:
+            s = load_fn() or {}
+            if s:
+                s['analog_gain_db_left'] = gain_db_left
+                s['analog_gain_db_right'] = gain_db_right
+                save_fn(s)
+        return {"status": "ok", "gain_db_left": gain_db_left, "gain_db_right": gain_db_right}
+    except Exception as e:
+        log.error("Exception in /adc_gain: %s", traceback.format_exc())
+        raise HTTPException(status_code=500, detail=str(e))
+
 @app.post("/stream_lc3")
 async def send_audio(audio_data: dict[str, str]):
-    """Sends a block of pre-coded LC3 audio via the worker."""
+    """Sends a block of pre-coded LC3 audio via the BLE loop."""
     try:
-        await _stream_lc3(audio_data, list(global_config_group.bigs))
+        await _on_ble_loop(_stream_lc3(audio_data, list(global_config_group.bigs)))
         return {"status": "audio_sent"}
     except Exception as e:
         raise HTTPException(status_code=500, detail=str(e))
@@ -582,9 +753,24 @@ async def get_status():
     secondary.update(secondary_persisted)
     status["secondary"] = secondary
     status["secondary_is_streaming"] = bool(secondary.get("is_streaming", False))
+    status["led_enabled"] = _LED_ENABLED
 
     return status
 
+@app.get("/audio_level")
+async def get_audio_level():
+    """Return current RMS audio levels for primary radio (lightweight, for polling)."""
+    if multicaster1 is None:
+        return {"levels": []}
+    return {"levels": multicaster1.get_audio_levels()}
+
+@app.get("/audio_level2")
+async def get_audio_level2():
+    """Return current RMS audio levels for secondary radio (lightweight, for polling)."""
+    if multicaster2 is None:
+        return {"levels": []}
+    return {"levels": multicaster2.get_audio_levels()}
+
 async def _autostart_from_settings():
     settings1 = load_stream_settings() or {}
     settings2 = load_stream_settings2() or {}
@@ -737,6 +923,8 @@ async def _autostart_from_settings():
                     immediate_rendering=immediate_rendering,
                     assisted_listening_stream=assisted_listening_stream,
                     presentation_delay_us=pres_delay if pres_delay is not None else 40000,
+                    analog_gain_db_left=settings.get('analog_gain_db_left', 0.0),
+                    analog_gain_db_right=settings.get('analog_gain_db_right', 0.0),
                     bigs=bigs,
                 )
                 # Set num_bis for stereo mode if needed
@@ -890,6 +1078,8 @@ async def _autostart_from_settings():
                     immediate_rendering=immediate_rendering,
                     assisted_listening_stream=assisted_listening_stream,
                     presentation_delay_us=pres_delay if pres_delay is not None else 40000,
+                    analog_gain_db_left=settings.get('analog_gain_db_left', 0.0),
+                    analog_gain_db_right=settings.get('analog_gain_db_right', 0.0),
                     bigs=bigs,
                 )
                 conf.qos_config = QOS_PRESET_MAP.get(saved_qos_preset, QOS_PRESET_MAP["Fast"])
@@ -907,13 +1097,27 @@ async def _autostart_from_settings():
     await do_primary()
     await do_secondary()
 
+async def _ble_startup():
+    """I2C init, ADC level reset, and autostart task scheduling on the BLE loop.
+
+    Bridged from _startup_autostart_event() so that these async subprocess
+    calls and the long-lived autostart coroutine all run on _ble_loop, never
+    on uvicorn's HTTP loop.
+    """
+    await _init_i2c_on_startup()
+    await _set_adc_level(0.0, 0.0)
+    log.info("[STARTUP] Scheduling autostart task on BLE loop")
+    asyncio.create_task(_autostart_from_settings())
+
+
 @app.on_event("startup")  
 async def _startup_autostart_event():
     # Spawn the autostart task without blocking startup
     log.info("[STARTUP] Auracast multicast server startup: initializing settings cache, I2C, and PipeWire cache")
+    _led_off()
     
     # Run install_asoundconf.sh script
-    script_path = os.path.join(os.path.dirname(__file__), '..', 'misc', 'install_asoundconf.sh')
+    script_path = os.path.join(os.path.dirname(__file__), '..', '..', 'misc', 'install_asoundconf.sh')
     try:
         log.info("[STARTUP] Running install_asoundconf.sh script")
         result = subprocess.run(['bash', script_path], capture_output=True, text=True, check=True)
@@ -924,13 +1128,13 @@ async def _startup_autostart_event():
         log.error(f"[STARTUP] Error running install_asoundconf.sh: {str(e)}")
     
     # Hydrate settings cache once to avoid disk I/O during /status
+    _load_led_settings()
     _init_settings_cache_from_disk()
-    await _init_i2c_on_startup()
-    # Ensure ADC mixer level is set at startup
-    await _set_adc_level_on_startup()
     refresh_pw_cache()
-    log.info("[STARTUP] Scheduling autostart task")
+    # I2C init, ADC setup and the autostart task must run on the BLE loop so
-    asyncio.create_task(_autostart_from_settings())
+    # they share the same event loop as the Bumble HCI transport.
+    log.info("[STARTUP] Bridging I2C init and autostart to BLE loop")
+    asyncio.run_coroutine_threadsafe(_ble_startup(), _ble_loop)
 
 @app.get("/audio_inputs_pw_usb")
 async def audio_inputs_pw_usb():
@@ -1001,6 +1205,9 @@ async def refresh_audio_devices():
 @app.post("/shutdown")
 async def shutdown():
     """Stops broadcasting and releases all audio/Bluetooth resources."""
+    return await _on_ble_loop(_shutdown_impl())
+
+async def _shutdown_impl():
     try:
         await _stop_all()
         return {"status": "stopped"}
@@ -1013,6 +1220,9 @@ async def system_reboot():
 
     Requires the service user to have passwordless sudo permissions to run 'reboot'.
     """
+    return await _on_ble_loop(_system_reboot_impl())
+
+async def _system_reboot_impl():
     try:
         # Best-effort: stop any active streaming cleanly WITHOUT persisting state
         try:
@@ -1036,46 +1246,26 @@ async def system_reboot():
 
 @app.post("/restart_dep")
 async def restart_dep():
-    """Restart DEP by running dep.sh stop then dep.sh start in the dep directory.
+    """Restart DEP via systemctl restart dep.service.
     
-    Requires the service user to have passwordless sudo permissions to run dep.sh.
+    Requires the service user to have passwordless sudo permissions for systemctl.
     """
     try:
-        # Get the dep directory path (dep.sh is in dante_package subdirectory)
+        log.info("Restarting DEP via systemctl...")
-        dep_dir = os.path.join(os.path.dirname(__file__), '..', '..', 'dep', 'dante_package')
+        proc = await asyncio.create_subprocess_exec(
-        
+            "sudo", "systemctl", "restart", "dep.service",
-        # Run dep.sh stop first
-        log.info("Stopping DEP...")
-        stop_process = await asyncio.create_subprocess_exec(
-            "sudo", "bash", "dep.sh", "stop",
-            cwd=dep_dir,
             stdout=asyncio.subprocess.PIPE,
             stderr=asyncio.subprocess.PIPE
         )
-        stop_stdout, stop_stderr = await stop_process.communicate()
+        stdout, stderr = await proc.communicate()
 
-        if stop_process.returncode != 0:
+        if proc.returncode == 0:
-            error_msg = stop_stderr.decode() if stop_stderr else "Unknown error"
-            log.error(f"Failed to stop DEP: {error_msg}")
-            raise HTTPException(status_code=500, detail=f"Failed to stop DEP: {error_msg}")
-        
-        # Run dep.sh start after stop succeeds
-        log.info("Starting DEP...")
-        start_process = await asyncio.create_subprocess_exec(
-            "sudo", "bash", "dep.sh", "start",
-            cwd=dep_dir,
-            stdout=asyncio.subprocess.PIPE,
-            stderr=asyncio.subprocess.PIPE
-        )
-        start_stdout, start_stderr = await start_process.communicate()
-        
-        if start_process.returncode == 0:
             log.info("DEP restarted successfully")
             return {"status": "success", "message": "DEP restarted successfully"}
         else:
-            error_msg = start_stderr.decode() if start_stderr else "Unknown error"
+            error_msg = stderr.decode() if stderr else "Unknown error"
-            log.error(f"Failed to start DEP: {error_msg}")
+            log.error(f"Failed to restart DEP: {error_msg}")
-            raise HTTPException(status_code=500, detail=f"Failed to start DEP: {error_msg}")
+            raise HTTPException(status_code=500, detail=f"Failed to restart DEP: {error_msg}")
 
     except HTTPException:
         raise
@@ -1169,6 +1359,9 @@ async def check_update():
 @app.post("/system_update")
 async def system_update():
     """Update application: git pull main branch (latest tag), poetry install, restart services."""
+    return await _on_ble_loop(_system_update_impl())
+
+async def _system_update_impl():
     try:
         # Best-effort: stop any active streaming cleanly
         try:
@@ -1218,26 +1411,12 @@ async def system_update():
             log.error("git checkout failed: %s", stderr.decode())
             raise HTTPException(status_code=500, detail=f"git checkout failed: {stderr.decode()}")
 
-        # 2. Run poetry install (use full path as poetry is in user's ~/.local/bin)
+        # 2. Hand off remaining work to the (now-updated) system_update.sh script
-        poetry_path = os.path.expanduser("~/.local/bin/poetry")
+        update_script = os.path.join(os.path.dirname(__file__), 'system_update.sh')
-        proc = await asyncio.create_subprocess_exec(
+        log.info("Handing off to system_update.sh...")
-            poetry_path, "install",
+        await asyncio.create_subprocess_exec(
-            cwd=project_root,
-            stdout=asyncio.subprocess.PIPE,
-            stderr=asyncio.subprocess.PIPE
-        )
-        stdout, stderr = await proc.communicate()
-        if proc.returncode != 0:
-            log.error("poetry install failed: %s", stderr.decode())
-            raise HTTPException(status_code=500, detail=f"poetry install failed: {stderr.decode()}")
-
-        # 3. Restart services via the update script
-        update_script = os.path.join(project_root, 'src', 'service', 'update_and_run_server_and_frontend.sh')
-        proc = await asyncio.create_subprocess_exec(
             "bash", update_script,
             cwd=project_root,
-            stdout=asyncio.subprocess.PIPE,
-            stderr=asyncio.subprocess.PIPE
         )
         # Don't wait for completion as we'll be restarted
         await asyncio.sleep(0.5)
@@ -1413,6 +1592,235 @@ async def download_recording(filename: str):
         raise HTTPException(status_code=500, detail=str(e))
 
 
+@app.delete("/delete_recordings")
+async def delete_recordings():
+    """Delete all recordings in the recordings folder."""
+    try:
+        deleted_count = 0
+        for filename in os.listdir(RECORDINGS_DIR):
+            filepath = os.path.join(RECORDINGS_DIR, filename)
+            if os.path.isfile(filepath):
+                try:
+                    os.remove(filepath)
+                    deleted_count += 1
+                    log.info("Deleted recording: %s", filename)
+                except Exception as e:
+                    log.warning("Failed to delete %s: %s", filename, e)
+        
+        log.info("Deleted %d recordings", deleted_count)
+        return {"success": True, "deleted_count": deleted_count}
+        
+    except Exception as e:
+        log.error("Exception in /delete_recordings: %s", e, exc_info=True)
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@app.get("/network_info")
+async def get_network_info():
+    """Get network information for all ethernet interfaces."""
+    try:
+        interfaces = {}
+        
+        hardcoded_devices = ["eth0", "eth1"]
+        
+        proc = await asyncio.create_subprocess_exec(
+            "nmcli", "-t", "-f", "NAME,DEVICE", "connection", "show",
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE
+        )
+        stdout, stderr = await proc.communicate()
+        
+        device_to_connection = {}
+        if proc.returncode == 0:
+            for line in stdout.decode().strip().split('\n'):
+                if not line:
+                    continue
+                parts = line.split(':')
+                if len(parts) >= 2:
+                    connection_name = parts[0]
+                    device_name = parts[1]
+                    if device_name in hardcoded_devices:
+                        device_to_connection[device_name] = connection_name
+        
+        for device in hardcoded_devices:
+            ip_address = None
+            
+            proc = await asyncio.create_subprocess_exec(
+                "nmcli", "-t", "-f", "IP4.ADDRESS", "device", "show", device,
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+            stdout, stderr = await proc.communicate()
+            
+            if proc.returncode == 0:
+                for line in stdout.decode().strip().split('\n'):
+                    if line.startswith('IP4.ADDRESS'):
+                        ip_parts = line.split(':')
+                        if len(ip_parts) >= 2:
+                            full_ip = ip_parts[1]
+                            ip_address = full_ip.split('/')[0]
+                            if not ip_address.startswith('169.254.'):
+                                break
+            
+            method = "auto"
+            connection_name = device_to_connection.get(device)
+            if connection_name:
+                proc = await asyncio.create_subprocess_exec(
+                    "nmcli", "-t", "-f", "ipv4.method", "connection", "show", connection_name,
+                    stdout=asyncio.subprocess.PIPE,
+                    stderr=asyncio.subprocess.PIPE
+                )
+                stdout, stderr = await proc.communicate()
+                
+                if proc.returncode == 0:
+                    for line in stdout.decode().strip().split('\n'):
+                        if line.startswith('ipv4.method:'):
+                            method = line.split(':')[1]
+                            break
+            
+            is_dhcp = method == "auto"
+            
+            interfaces[device] = {
+                "ip_address": ip_address or "N/A",
+                "is_dhcp": is_dhcp,
+                "method": method,
+                "connection_name": connection_name
+            }
+        
+        port_mapping = {
+            "port1": "eth0",
+            "port2": "eth1"
+        }
+        
+        return {
+            "interfaces": interfaces,
+            "port_mapping": port_mapping
+        }
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        log.error("Exception in /network_info: %s", e, exc_info=True)
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@app.post("/set_network_config")
+async def set_network_config(config: dict):
+    """Set network configuration (DHCP or Static IP) for a specific interface.
+    
+    Expected payload:
+    {
+        "interface": "eth0",
+        "is_dhcp": true/false,
+        "ip_address": "192.168.1.100" (required if is_dhcp is false),
+        "netmask": "24" (optional, defaults to 24)
+    }
+    """
+    try:
+        interface = config.get("interface")
+        is_dhcp = config.get("is_dhcp", True)
+        ip_address = config.get("ip_address")
+        netmask = config.get("netmask", "24")
+        
+        if not interface:
+            raise HTTPException(status_code=400, detail="Interface name is required")
+        
+        proc = await asyncio.create_subprocess_exec(
+            "nmcli", "-t", "-f", "NAME,DEVICE", "connection", "show",
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE
+        )
+        stdout, stderr = await proc.communicate()
+        
+        if proc.returncode != 0:
+            raise HTTPException(status_code=500, detail="Failed to get network connections")
+        
+        connection_name = None
+        for line in stdout.decode().strip().split('\n'):
+            if not line:
+                continue
+            parts = line.split(':')
+            if len(parts) >= 2 and parts[1] == interface:
+                connection_name = parts[0]
+                break
+        
+        if not connection_name:
+            log.info(f"No connection found for {interface}, creating new connection")
+            proc = await asyncio.create_subprocess_exec(
+                "sudo", "nmcli", "con", "add", "type", "ethernet", 
+                "ifname", interface, "con-name", f"Wired connection {interface}",
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+            stdout, stderr = await proc.communicate()
+            
+            if proc.returncode != 0:
+                raise HTTPException(status_code=500, detail=f"Failed to create connection for {interface}: {stderr.decode()}")
+            
+            connection_name = f"Wired connection {interface}"
+        
+        if is_dhcp:
+            proc = await asyncio.create_subprocess_exec(
+                "sudo", "nmcli", "con", "modify", connection_name, "ipv4.method", "auto",
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+            await proc.communicate()
+            
+            if proc.returncode != 0:
+                raise HTTPException(status_code=500, detail="Failed to set DHCP mode")
+            
+            proc = await asyncio.create_subprocess_exec(
+                "sudo", "nmcli", "con", "modify", connection_name, "ipv4.addresses", "",
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+            await proc.communicate()
+            
+        else:
+            if not ip_address:
+                raise HTTPException(status_code=400, detail="IP address is required for static configuration")
+            
+            import re
+            ip_pattern = re.compile(r'^(\d{1,3}\.){3}\d{1,3}$')
+            if not ip_pattern.match(ip_address):
+                raise HTTPException(status_code=400, detail="Invalid IP address format")
+            
+            octets = ip_address.split('.')
+            if not all(0 <= int(octet) <= 255 for octet in octets):
+                raise HTTPException(status_code=400, detail="IP address octets must be between 0 and 255")
+            
+            proc = await asyncio.create_subprocess_exec(
+                "sudo", "nmcli", "con", "modify", connection_name, 
+                "ipv4.method", "manual",
+                "ipv4.addresses", f"{ip_address}/{netmask}",
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+            await proc.communicate()
+            
+            if proc.returncode != 0:
+                raise HTTPException(status_code=500, detail="Failed to set static IP")
+        
+        proc = await asyncio.create_subprocess_exec(
+            "sudo", "nmcli", "con", "up", connection_name,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE
+        )
+        stdout, stderr = await proc.communicate()
+        
+        if proc.returncode != 0:
+            log.info("Connection activation returned non-zero (may be expected if no cable): %s", stderr.decode())
+        
+        return {"status": "success", "message": f"Network configuration updated for {interface}"}
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        log.error("Exception in /set_network_config: %s", e, exc_info=True)
+        raise HTTPException(status_code=500, detail=str(e))
+
+
 if __name__ == '__main__':
     import os
     os.chdir(os.path.dirname(__file__))
@@ -1421,5 +1829,170 @@ if __name__ == '__main__':
         level=os.environ.get('LOG_LEVEL', log.INFO),
         format='%(module)s.py:%(lineno)d %(levelname)s: %(message)s'
     )
+
+    # ── GIL switch interval ─────────────────────────────────────────────────
+    # CPython releases the GIL every sys.getswitchinterval() seconds (default
+    # 5 ms).  The audio pipeline fires every 10 ms, so a 5 ms granularity
+    # means up to half a frame period can be wasted waiting for the GIL.
+    # Reducing to 1 ms gives the BLE thread much tighter access.
+    import sys
+    sys.setswitchinterval(0.001)
+    log.info("GIL switch interval set to 1 ms")
+
+    # ── BLE / audio event loop ──────────────────────────────────────────────
+    # Bumble (serial_asyncio / HCI) and the audio pipeline run exclusively on
+    # this loop.  Uvicorn's HTTP accept/read/write callbacks run on a separate
+    # asyncio loop in the main thread, so they can never stall BLE advertising
+    # or audio encoding.
+    #
+    # Route handlers that touch Bumble objects call _on_ble_loop(), which uses
+    # asyncio.run_coroutine_threadsafe() + asyncio.wrap_future() to submit the
+    # coroutine to _ble_loop and await the result back in uvicorn's loop.
+    # Hot-path read-only endpoints (/status, /audio_level*) access
+    # multicaster state directly – Python's GIL makes attribute reads safe.
+
+    def _pthread_sched_lib():
+        """Return a ctypes handle with correctly typed pthread scheduling symbols.
+
+        Uses RTLD_DEFAULT (ctypes.CDLL(None)) to resolve symbols from all
+        currently loaded shared libraries.  This handles both:
+          - glibc < 2.34: pthread_self/pthread_setschedparam live in libpthread.so.0
+          - glibc >= 2.34: pthreads merged into libc.so.6
+        using find_library("c") would miss libpthread on older glibc and cause
+        a NULL function pointer → SEGV when called.
+
+        Explicit restype/argtypes are mandatory: pthread_t is c_ulong (64-bit
+        on ARM64/x86-64) but ctypes defaults to c_int (32-bit), truncating
+        the thread handle and causing a SEGV inside pthread_setschedparam.
+        """
+        import ctypes
+
+        SCHED_FIFO  = 1
+        SCHED_OTHER = 0
+
+        class SchedParam(ctypes.Structure):
+            _fields_ = [("sched_priority", ctypes.c_int)]
+
+        lib = ctypes.CDLL(None, use_errno=True)  # RTLD_DEFAULT
+
+        lib.pthread_self.restype  = ctypes.c_ulong
+        lib.pthread_self.argtypes = []
+
+        lib.pthread_getschedparam.restype  = ctypes.c_int
+        lib.pthread_getschedparam.argtypes = [
+            ctypes.c_ulong,
+            ctypes.POINTER(ctypes.c_int),
+            ctypes.POINTER(SchedParam),
+        ]
+        lib.pthread_setschedparam.restype  = ctypes.c_int
+        lib.pthread_setschedparam.argtypes = [
+            ctypes.c_ulong,
+            ctypes.c_int,
+            ctypes.POINTER(SchedParam),
+        ]
+        return lib, SchedParam, SCHED_FIFO, SCHED_OTHER
+
+    def _configure_ble_thread_scheduling():
+        """Confirm or establish SCHED_FIFO for the BLE/audio thread.
+
+        When launched via the systemd unit (CPUSchedulingPolicy=fifo), new
+        threads inherit the process RT policy automatically – just log and
+        return.  When run directly (development), attempt to elevate to
+        SCHED_FIFO/30 (requires CAP_SYS_NICE), falling back gracefully.
+        """
+        import ctypes
+        try:
+            lib, SchedParam, SCHED_FIFO, _ = _pthread_sched_lib()
+            tid     = lib.pthread_self()
+            policy  = ctypes.c_int(-1)
+            param   = SchedParam(0)
+            lib.pthread_getschedparam(tid, ctypes.byref(policy), ctypes.byref(param))
+
+            if policy.value == SCHED_FIFO:
+                log.info("[BLE-LOOP] Already SCHED_FIFO priority=%d (inherited from systemd)",
+                         param.sched_priority)
+                return
+
+            param.sched_priority = 30
+            ret = lib.pthread_setschedparam(tid, SCHED_FIFO, ctypes.byref(param))
+            if ret == 0:
+                log.info("[BLE-LOOP] SCHED_FIFO priority=30 set")
+            else:
+                err = ctypes.get_errno()
+                log.warning("[BLE-LOOP] SCHED_FIFO failed (errno=%d: %s) – "
+                            "use systemd CPUSchedulingPolicy=fifo or grant CAP_SYS_NICE",
+                            err, os.strerror(err))
+                try:
+                    os.setpriority(os.PRIO_PROCESS, 0,
+                                   os.getpriority(os.PRIO_PROCESS, 0) - 5)
+                except PermissionError:
+                    pass
+        except Exception as exc:
+            log.warning("[BLE-LOOP] Scheduling setup error: %s", exc)
+
+    def _configure_http_thread_scheduling():
+        """Demote the HTTP (uvicorn) thread to SCHED_OTHER + nice=+10.
+
+        When systemd sets CPUSchedulingPolicy=fifo, every thread in the
+        process – including uvicorn's main loop – inherits SCHED_FIFO.
+        We demote the HTTP thread back to SCHED_OTHER so the BLE thread
+        always wins CPU arbitration when both are runnable.
+        Lowering scheduling policy never requires special privileges.
+        """
+        import ctypes
+        try:
+            lib, SchedParam, SCHED_FIFO, SCHED_OTHER = _pthread_sched_lib()
+            tid    = lib.pthread_self()
+            policy = ctypes.c_int(-1)
+            param  = SchedParam(0)
+            lib.pthread_getschedparam(tid, ctypes.byref(policy), ctypes.byref(param))
+
+            if policy.value == SCHED_FIFO:
+                param.sched_priority = 0
+                ret = lib.pthread_setschedparam(tid, SCHED_OTHER, ctypes.byref(param))
+                if ret == 0:
+                    log.info("[HTTP] Demoted SCHED_FIFO → SCHED_OTHER")
+                else:
+                    err = ctypes.get_errno()
+                    log.warning("[HTTP] Could not demote from SCHED_FIFO (errno=%d)", err)
+            else:
+                log.info("[HTTP] Already SCHED_OTHER, no demotion needed")
+        except Exception as exc:
+            log.warning("[HTTP] Scheduling demotion error: %s", exc)
+
+        try:
+            os.nice(10)
+            log.info("[HTTP] nice=+10 (lower priority)")
+        except Exception as exc:
+            log.debug("[HTTP] os.nice: %s", exc)
+
+    _ble_loop_ready = threading.Event()
+
+    def _run_ble_loop():
+        # Confirm or establish RT scheduling before entering the event loop.
+        _configure_ble_thread_scheduling()
+
+        async def _ble_runner():
+            global _ble_loop
+            _ble_loop = asyncio.get_running_loop()
+            _ble_loop_ready.set()
+            # Keep the loop alive; it is stopped when the process exits because
+            # this is a daemon thread.
+            await asyncio.Event().wait()
+
+        asyncio.run(_ble_runner())
+
+    _ble_thread = threading.Thread(target=_run_ble_loop, name="ble-loop", daemon=True)
+    _ble_thread.start()
+    if not _ble_loop_ready.wait(timeout=5):
+        log.error("BLE event loop failed to start within 5 s – aborting")
+        raise RuntimeError("BLE event loop startup timeout")
+    log.info("BLE event loop started on thread '%s'", _ble_thread.name)
+
+    # ── HTTP / uvicorn event loop (main thread) ─────────────────────────────
+    # Demote the HTTP thread from SCHED_FIFO (if set by systemd) to
+    # SCHED_OTHER + nice=+10 so the BLE thread always preempts it.
+    _configure_http_thread_scheduling()
+
     # Bind to localhost only for security: prevents network access, only frontend on same machine can connect
     uvicorn.run(app, host="127.0.0.1", port=5000, access_log=False)

src/auracast/server/start_frontend_https.sh

@@ -33,5 +33,12 @@ echo "Using Avahi domain: $AVAHI_DOMAIN"
 # Path to poetry binary
 POETRY_BIN="/home/caster/.local/bin/poetry"
 
+# Start HTTP->HTTPS redirect server on port 80 (background)
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+python3 "$SCRIPT_DIR/http_to_https_redirect.py" 80 &
+REDIRECT_PID=$!
+echo "HTTP->HTTPS redirect server started (PID $REDIRECT_PID)"
+trap "kill $REDIRECT_PID 2>/dev/null" EXIT
+
 # Start Streamlit HTTPS server (port 443)
 $POETRY_BIN run streamlit run multicast_frontend.py --server.port 443 --server.address 0.0.0.0 --server.enableCORS false --server.enableXsrfProtection false --server.headless true --server.sslCertFile "$CERT" --server.sslKeyFile "$KEY" --browser.gatherUsageStats false

src/auracast/server/system_update.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+# system_update.sh - Runs after git checkout in the Python system_update endpoint.
+# Called with the current working directory = project root.
+# All output is also written to /tmp/system_update.log for debugging.
+
+exec > >(tee -a /tmp/system_update.log) 2>&1
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
+POETRY="$HOME/.local/bin/poetry"
+OPENOCD_SRC="$HOME/sw_openocd"
+OPENOCD_REPO="ssh://git@gitea.summitwave.work:222/auracaster/sw_openocd.git"
+OPENOCD_BRANCH="change-8818"
+OPENOCD_MARKER="$OPENOCD_SRC/.last_built_commit"
+OPENOCD_DIR="$PROJECT_ROOT/src/openocd"
+
+echo "[system_update] Starting post-checkout update. project_root=$PROJECT_ROOT"
+
+# 1. poetry install
+echo "[system_update] Running poetry install..."
+(cd "$PROJECT_ROOT" && "$POETRY" install)
+if [ $? -ne 0 ]; then
+    echo "[system_update] ERROR: poetry install failed"
+    exit 1
+fi
+
+# 2. Clone/update and build sw_openocd if needed
+if [ ! -d "$OPENOCD_SRC" ]; then
+    echo "[system_update] Installing sw_openocd build dependencies..."
+    sudo apt install -y git build-essential libtool autoconf texinfo \
+        libusb-1.0-0-dev libftdi1-dev libhidapi-dev pkg-config || \
+        echo "[system_update] WARNING: apt install deps had errors, continuing"
+    sudo apt-get install -y pkg-config libjim-dev || \
+        echo "[system_update] WARNING: apt-get install libjim-dev had errors, continuing"
+
+    echo "[system_update] Cloning sw_openocd branch $OPENOCD_BRANCH..."
+    git clone --branch "$OPENOCD_BRANCH" --single-branch "$OPENOCD_REPO" "$OPENOCD_SRC"
+    if [ $? -ne 0 ]; then
+        echo "[system_update] ERROR: git clone sw_openocd failed"
+        exit 1
+    fi
+else
+    echo "[system_update] Updating sw_openocd..."
+    git -C "$OPENOCD_SRC" fetch origin "$OPENOCD_BRANCH"
+    git -C "$OPENOCD_SRC" checkout "$OPENOCD_BRANCH"
+    git -C "$OPENOCD_SRC" pull
+fi
+
+OPENOCD_COMMIT=$(git -C "$OPENOCD_SRC" rev-parse HEAD)
+LAST_BUILT=""
+[ -f "$OPENOCD_MARKER" ] && LAST_BUILT=$(cat "$OPENOCD_MARKER")
+
+if [ "$OPENOCD_COMMIT" != "$LAST_BUILT" ]; then
+    echo "[system_update] Building sw_openocd (commit $OPENOCD_COMMIT)..."
+
+    (cd "$OPENOCD_SRC" && ./bootstrap)
+    if [ $? -ne 0 ]; then echo "[system_update] ERROR: openocd bootstrap failed"; exit 1; fi
+
+    (cd "$OPENOCD_SRC" && ./configure --enable-bcm2835gpio --enable-sysfsgpio)
+    if [ $? -ne 0 ]; then echo "[system_update] ERROR: openocd configure failed"; exit 1; fi
+
+    (cd "$OPENOCD_SRC" && make)
+    if [ $? -ne 0 ]; then echo "[system_update] ERROR: openocd make failed"; exit 1; fi
+
+    (cd "$OPENOCD_SRC" && sudo make install)
+    if [ $? -ne 0 ]; then echo "[system_update] ERROR: openocd make install failed"; exit 1; fi
+
+    echo "$OPENOCD_COMMIT" > "$OPENOCD_MARKER"
+    echo "[system_update] sw_openocd built and installed (commit $OPENOCD_COMMIT)"
+else
+    echo "[system_update] sw_openocd up to date (commit $OPENOCD_COMMIT), skipping build"
+fi
+
+# 3. Flash firmware to both SWD interfaces
+FLASH_SCRIPT="$OPENOCD_DIR/flash.sh"
+HEX_FILE="$OPENOCD_DIR/merged.hex"
+
+for IFACE in swd0 swd1; do
+    echo "[system_update] Flashing $IFACE..."
+    (cd "$OPENOCD_DIR" && bash "$FLASH_SCRIPT" -i "$IFACE" -f "$HEX_FILE")
+    if [ $? -ne 0 ]; then
+        echo "[system_update] ERROR: flash $IFACE failed"
+        exit 1
+    fi
+    echo "[system_update] Flash $IFACE complete"
+done
+
+# 4. Restart services (this will kill this process too)
+echo "[system_update] Restarting services..."
+bash "$PROJECT_ROOT/src/service/update_and_run_server_and_frontend.sh"

src/dep/dante_package/dante_data/activation/.gitkeep

@@ -0,0 +1 @@
+Placeholder file to have the activation folder available, otherwise dante activation script fails with 'Unable to write'.

src/dep/dante_package/dante_data/capability/dante.json

@@ -1,5 +1,5 @@
 {
-	"trialMode": true,
+	"trialMode": false,
 	"$schema": "./dante.json_schema.json",
 	"platform":
 	{
@@ -16,7 +16,7 @@
 				48000
 			],
 		"samplesPerPeriod" : 16,
-		"periodsPerBuffer" : 300,
+		"periodsPerBuffer" : 150,
 		"networkLatencyMinMs" : 2,
 		"networkLatencyDefaultMs" : 5,
 		"supportedEncodings" :
@@ -24,7 +24,10 @@
 				"PCM16"
 			],
 		"defaultEncoding" : "PCM16",
-		"numDepCores" : 1
+		"numDepCores" : 
+			[
+				3
+			]
 	},
 	"network" :
 	{
@@ -50,31 +53,32 @@
 	"alsaAsrc":
 	{
 		"enableAlsaAsrc": true,
+		"cpuAffinity": 3,
 		"deviceConfigurations": [
 			{
-			"deviceIdentifier": "hw:0,0",
+			"deviceIdentifier": "hw:6,0,0",
 			"direction": "playback",
 			"bitDepth": 16,
 			"numOpenChannels": 6,
 			"alsaChannelRange": "0-5",
 			"danteChannelRange": "0-5",
-			"bufferSize": 4800,
+			"bufferSize": 960,
 			"samplesPerPeriod": 16
 			}
 		]
 	},
 	"product" :
 	{
-		"manfId" : "Audinate",
+		"manfId" : "SummitFC",
-		"manfName" : "Audinate Pty Ltd",
+		"manfName" : "Summitwave FlexCo",
-		"modelId" : "OEMDEP",
+		"modelId" : "TX",
-		"modelName" : "Linux Dante Embedded Platform",
+		"modelName" : "Summitwave TX",
 		"modelVersion" :
 			{
-				"major" : 9,
+				"major" : 1,
-				"minor" : 9,
+				"minor" : 0,
-				"bugfix" : 99
+				"bugfix" : 0
 			},
-		"devicePrefix" : "DEP"
+		"devicePrefix" : "SW-TX"
 	}
 }

src/misc/asound.conf

@@ -6,8 +6,8 @@ pcm.ch1 {
         channels 2
         rate 48000
         format S16_LE
-        period_size 120    
+        period_size 240    
-        buffer_size 240    
+        buffer_size 960    
     }
     bindings.0  0
 }
@@ -21,8 +21,8 @@ pcm.ch2 {
         channels 2
         rate 48000
         format S16_LE
-        period_size 120
+        period_size 240
-        buffer_size 240
+        buffer_size 960
     }    
     bindings.0  1
 }

src/misc/install_asoundconf.sh

@@ -1 +1,2 @@
-sudo cp src/misc/asound.conf /etc/asound.conf
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+sudo cp "$SCRIPT_DIR/asound.conf" /etc/asound.conf

src/openocd/flash.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+set -e
+
+INTERFACE="swd0"
+HEX_FILE=""
+
+usage() {
+  echo "Usage: $0 -f <hex_file> [-i swd0|swd1]"
+  exit 1
+}
+
+while getopts "f:i:h" opt; do
+  case "$opt" in
+    f) HEX_FILE="$OPTARG" ;;
+    i)
+      if [[ "$OPTARG" == "swd0" || "$OPTARG" == "swd1" ]]; then
+        INTERFACE="$OPTARG"
+      else
+        usage
+      fi
+      ;;
+    h) usage ;;
+    *) usage ;;
+  esac
+done
+
+[[ -n "$HEX_FILE" ]] || usage
+[[ -f "$HEX_FILE" ]] || { echo "HEX file not found: $HEX_FILE"; exit 1; }
+
+sudo openocd \
+  -f ./raspberrypi-${INTERFACE}.cfg \
+  -c "init" \
+  -c "reset init" \
+  -c "flash banks" \
+  -c "flash write_image $HEX_FILE" \
+  -c "verify_image $HEX_FILE" \
+  -c "reset run" \
+  -c "shutdown"
+
+sudo openocd \
+  -f ./raspberrypi-${INTERFACE}.cfg \
+  -c "init" \
+  -c "nrf54l.dap apreg 2 0x000 0x1" \
+  -c "sleep 100" \
+  -c "nrf54l.dap apreg 2 0x000 0x0" \
+  -c "shutdown"
+
+sudo openocd \
+  -f ./raspberrypi-${INTERFACE}.cfg \
+  -c "init" \
+  -c "nrf54l.dap apreg 2 0x000 0x4" \
+  -c "sleep 100" \
+  -c "nrf54l.dap apreg 2 0x000 0x0" \
+  -c "shutdown"
+
+echo "Flashing complete."

src/openocd/raspberrypi-swd0.cfg

@@ -5,4 +5,9 @@ adapter gpio swdio 26
 #adapter gpio trst 26
 #reset_config trst_only
 
+
+source [find target/nordic/nrf54l.cfg]
+
+flash bank $_CHIPNAME.flash nrf54 0x00000000 0 0 0 $_TARGETNAME
+
 adapter speed 1000

src/openocd/raspberrypi-swd1.cfg

@@ -5,4 +5,9 @@ adapter gpio swdio 24
 #adapter gpio trst 27
 #reset_config trst_only
 
+
+source [find target/nordic/nrf54l.cfg]
+
+flash bank $_CHIPNAME.flash nrf54 0x00000000 0 0 0 $_TARGETNAME
+
 adapter speed 1000

src/service/10-link-local-mgmt

@@ -0,0 +1,64 @@
+#!/bin/bash
+# NetworkManager dispatcher script: 10-link-local-mgmt
+#
+# Temporarily suppresses IPv4 link-local when a DHCP address is available,
+# using nmcli device modify (active session only, NOT saved to the profile).
+# The persistent profile always keeps ipv4.link-local=enabled so that
+# direct-connect (no DHCP) plug-ins always activate and trigger events.
+# Avahi is reloaded on each event — no /etc/avahi/hosts file, avahi uses
+# natural per-interface advertisement so each segment gets the right IP.
+#
+# Triggers: up, down, dhcp4-change on ethernet interfaces
+# Install to: /etc/NetworkManager/dispatcher.d/10-link-local-mgmt
+# Permissions: root:root 0755
+
+INTERFACE="$1"
+ACTION="$2"
+# Only handle ethernet interfaces
+if [[ ! "$INTERFACE" =~ ^eth ]]; then
+    exit 0
+fi
+
+reload_avahi() {
+    systemctl reload avahi-daemon 2>/dev/null || systemctl restart avahi-daemon 2>/dev/null
+    logger -t nm-link-local "[$INTERFACE] $ACTION — avahi reloaded"
+}
+
+case "$ACTION" in
+    up)
+        # On 'up' the interface may still carry a stale DHCP address from the previous
+        # session (NM hasn't cleaned it up yet). Reading ip-addr here is unreliable.
+        # Always re-enable link-local as a clean slate; let dhcp4-change suppress it
+        # later if a real DHCP lease is obtained.
+        logger -t nm-link-local "[$INTERFACE] Up — ensuring link-local active (clean slate)"
+        (sleep 2 && nmcli device modify "$INTERFACE" ipv4.link-local enabled 2>/dev/null \
+            && logger -t nm-link-local "[$INTERFACE] Link-local explicitly enabled on up") &
+        reload_avahi
+        ;;
+
+    dhcp4-change)
+        # dhcp4-change fires only when DHCP actually succeeds (new/renewed lease).
+        # At this point the DHCP IP is reliably present — safe to read and suppress link-local.
+        DHCP_IP=$(ip -4 addr show "$INTERFACE" 2>/dev/null \
+            | grep -oP '(?<=inet\s)\d+(\.\d+){3}' \
+            | grep -v '^127\.' \
+            | grep -v '^169\.254\.' \
+            | head -n1)
+
+        if [ -n "$DHCP_IP" ]; then
+            logger -t nm-link-local "[$INTERFACE] DHCP $DHCP_IP confirmed — suppressing link-local (session only)"
+            # Run in background after a delay — nmcli blocks on NM, which is waiting for
+            # this dispatcher to return, causing a deadlock if called synchronously.
+            (sleep 2 && nmcli device modify "$INTERFACE" ipv4.link-local disabled 2>/dev/null \
+                && logger -t nm-link-local "[$INTERFACE] Link-local suppressed for current session") &
+        fi
+        reload_avahi
+        ;;
+
+    down)
+        # NOTE: a carrier-change does NOT fully reset session-level 'device modify' state.
+        # The re-enable is therefore handled in the 'up' handler when no DHCP is detected.
+        logger -t nm-link-local "[$INTERFACE] Down — link-local will be re-enabled on next up without DHCP"
+        reload_avahi
+        ;;
+esac

src/service/auracast-frontend.service

@@ -10,6 +10,8 @@ WorkingDirectory=/home/caster/bumble-auracast/src/auracast/server
 ExecStart=/home/caster/bumble-auracast/src/auracast/server/start_frontend_https.sh
 Restart=on-failure
 Environment=LOG_LEVEL=INFO
+AllowedCPUs=0
+CPUAffinity=0
 
 [Install]
 WantedBy=multi-user.target

src/service/auracast-script.service

@@ -9,6 +9,8 @@ ExecStart=/home/caster/bumble-auracast/.venv/bin/python src/auracast/multicast_s
 Restart=on-failure
 Environment=PYTHONUNBUFFERED=1
 Environment=LOG_LEVEL=INFO
+AllowedCPUs=0
+CPUAffinity=0
 
 [Install]
 WantedBy=default.target

src/service/auracast-server.service

@@ -1,6 +1,7 @@
 [Unit]
 Description=Auracast Backend Server
-After=network.target
+After=network.target dep.service
+Wants=dep.service
 
 [Service]
 Type=simple
@@ -10,8 +11,10 @@ Restart=on-failure
 Environment=PYTHONUNBUFFERED=1
 Environment=LOG_LEVEL=INFO
 CPUSchedulingPolicy=fifo
-CPUSchedulingPriority=99
+CPUSchedulingPriority=10
 LimitRTPRIO=99
+AllowedCPUs=0,1,2
+CPUAffinity=0,1,2
 
 [Install]
 WantedBy=default.target

src/service/dep.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=DEP (Dante Embedded Platform) Container
+After=network.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+WorkingDirectory=/home/caster/bumble-auracast/src/dep/dante_package
+ExecStart=/bin/bash dep.sh start
+ExecStop=/bin/bash dep.sh stop
+
+[Install]
+WantedBy=multi-user.target

src/service/pipewire-aes67.service

@@ -9,6 +9,8 @@ ExecStartPre=/bin/sh -lc 'for i in $(seq 1 60); do ip route show default >/dev/n
 ExecStart=/usr/bin/pipewire-aes67 -c /home/caster/bumble-auracast/src/service/aes67/pipewire-aes67.conf
 Restart=always
 RestartSec=5s
+AllowedCPUs=0
+CPUAffinity=0
 # Avoid StartLimitHit on quick failures during boot; let RestartSec handle pacing
 StartLimitIntervalSec=0
 

src/service/ptp_aes67.service

@@ -6,6 +6,8 @@ After=network.target
 Type=simple
 ExecStart=/usr/sbin/ptp4l -i eth0 -f /home/caster/bumble-auracast/src/service/aes67/ptp_aes67_1.conf
 Restart=on-failure
+AllowedCPUs=0
+CPUAffinity=0
 StandardOutput=journal
 StandardError=journal
 

src/service/update_and_run_server_and_frontend.sh

@@ -4,6 +4,48 @@ set -e
 # This script installs, enables, and restarts the auracast-server and auracast-frontend services
 # Requires sudo privileges
 
+# Ensure static link local is activated (for direct laptop connection)
+# Enable link-local for all wired ethernet connections
+while IFS=: read -r name type; do
+    if [[ "$type" == *"ethernet"* ]]; then
+        echo "Configuring connection: $name"
+        # link-local: always enabled so direct-connect (no DHCP) works immediately
+        sudo nmcli connection modify "$name" ipv4.link-local enabled 2>/dev/null || echo "Failed to modify $name"
+        # may-fail=yes: do NOT tear down the connection when DHCP times out.
+        # Without this, NM declares ip-config-unavailable after the 45s DHCP timeout
+        # and enters a reconnect loop that causes ~1.5 min outages every ~45 seconds.
+        sudo nmcli connection modify "$name" ipv4.may-fail yes 2>/dev/null || echo "Failed to set may-fail on $name"
+        # Infinite DHCP timeout: NM keeps retrying DHCP in the background but never
+        # declares ip-config-unavailable. This prevents the 45s reconnect loop that
+        # kills the link-local address in direct-connect (no DHCP server) scenarios.
+        sudo nmcli connection modify "$name" ipv4.dhcp-timeout infinity 2>/dev/null || echo "Failed to set dhcp-timeout on $name"
+        sudo nmcli connection up "$name" 2>/dev/null || echo "Failed to bring up $name"
+    fi
+done < <(nmcli -t -f NAME,TYPE connection show)
+
+
+# Remove stale avahi hosts pin — this file overrides per-interface advertisement
+# and causes mDNS to always resolve to eth0's IP regardless of which interface
+# the query arrived on, breaking eth1 mDNS entirely.
+sudo rm -f /etc/avahi/hosts
+sudo systemctl restart avahi-daemon
+
+# Ensure Loopback is loaded with a fixed name and index 
+# Needed for dante
+# TODO image when we create the next image this should be part of it
+echo "options snd-aloop index=6 id=Loopback pcm_substreams=6" | sudo tee /etc/modprobe.d/snd-aloop.conf
+echo snd-aloop | sudo tee /etc/modules-load.d/snd-aloop.conf
+
+
+
+# Install NetworkManager dispatcher script for link-local / Avahi management
+sudo cp /home/caster/bumble-auracast/src/service/10-link-local-mgmt /etc/NetworkManager/dispatcher.d/10-link-local-mgmt
+sudo chown root:root /etc/NetworkManager/dispatcher.d/10-link-local-mgmt
+sudo chmod 755 /etc/NetworkManager/dispatcher.d/10-link-local-mgmt
+
+# Copy system service file for DEP
+sudo cp /home/caster/bumble-auracast/src/service/dep.service /etc/systemd/system/dep.service
+
 # Copy system service file for frontend
 sudo cp /home/caster/bumble-auracast/src/service/auracast-frontend.service /etc/systemd/system/auracast-frontend.service
 
@@ -11,20 +53,25 @@ sudo cp /home/caster/bumble-auracast/src/service/auracast-frontend.service /etc/
 mkdir -p /home/caster/.config/systemd/user
 cp /home/caster/bumble-auracast/src/service/auracast-server.service /home/caster/.config/systemd/user/auracast-server.service
 
-# Reload systemd for frontend
+# Reload systemd for frontend and dep
 sudo systemctl daemon-reload
 # Reload user systemd for server
 systemctl --user daemon-reload
 
+# Enable DEP to start on boot (system)
+sudo systemctl enable dep.service
 # Enable frontend to start on boot (system)
 sudo systemctl enable auracast-frontend.service
 # Enable server to start on boot (user)
 systemctl --user enable auracast-server.service
 
-# Restart both
+# Restart all
+sudo systemctl restart dep.service
+
 sudo systemctl restart auracast-frontend.service
 systemctl --user restart auracast-server.service
 
 #print status
+sudo systemctl status dep.service --no-pager
 sudo systemctl status auracast-frontend.service --no-pager
 systemctl --user status auracast-server.service --no-pager