Randomize Broadcast ID per stream instead of using static values

src/auracast/server/multicast_frontend.py

@@ -1588,7 +1588,6 @@ if start_stream:
                 analog_gain=cfg.get('analog_gain', 50),
                 bigs=[
                     auracast_config.AuracastBigConfig(
-                        id=cfg.get('id', 123456),
                         code=(cfg['stream_passwort'].strip() or None),
                         name=cfg['name'],
                         program_info=cfg['program_info'],
@@ -1643,8 +1642,6 @@ 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_')
@@ -1652,7 +1649,6 @@ 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'],

src/auracast/server/multicast_server.py

@@ -133,6 +133,10 @@ 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
@@ -454,10 +458,12 @@ 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))