update ptp config and readme

README.md

@@ -10,8 +10,8 @@ sudo cp 90-pipewire-aes67-ptp.rules /etc/udev/rules.d/
 sudo udevadm control --reload-rules && sudo udevadm trigger
 
 # start ptp
-sudo ptp4l -mq -i eth0 -f aes67.conf
-also try:
+sudo ptp4l -mq -i eth0 -f ptp_aes67_1.conf
+also try (SOFTWARE sync!):
 sudo ptp4l -i eth0 -s -l 7 -m -q
 TODO: try to use two cm4  clock sync - with rpi5 and cm4 sync is lost periodicaly
 
@@ -30,6 +30,8 @@ pw-link -i    # List input ports (sinks, e.g. Jabra SPEAK 410)
 
 # Attach a monitor
 pw-link stream_box1:receive_CH1 alsa_output.usb-0b0e_Jabra_SPEAK_410_USB_08C8C2AE9777x011200-00.analog-stereo:playback_FL
+pw-link AVIOUSB-8f6326 : 2:receive_Left alsa_output.usb-0b0e_Jabra_SPEAK_410_USB_08C8C2AE9777x011200-00.analog-stereo:playback_FL
+
 
 systemctl --user status pipewire
 should not show broken pipe
@@ -43,4 +45,8 @@ pw-link -l
 apt install ffmpeg
 ffmpeg -re -i /usr/share/sounds/alsa/Front_Center.wav \
   -acodec pcm_s16le -ar 48000 -ac 2 \
-  -f rtp rtp://239.69.150.243:5004
+  -f rtp rtp://239.69.150.243:5004
+
+# troubleshooting
+- if rtp sources keep 'piling up'
+  - $ systemctl --user restart pipewire.service 

ptp_aes67_1.conf

@@ -0,0 +1,19 @@
+[global]
+priority1 255
+priority2 254
+# Lower = more likely to become Grandmaster. Keep the same on both for "either can be master".
+domainNumber 0          
+# Default domain
+logSyncInterval -3      
+# AES67 profile: Sync messages every 125ms
+logAnnounceInterval 1   
+# Announce messages every 2s (AES67 default)
+logMinDelayReqInterval 0
+dscp_event 46           
+# QoS for event messages
+dscp_general 0          
+# QoS for general messages
+step_threshold 1        
+# Fast convergence on time jumps
+
+tx_timestamp_timeout 20

ptp_aes67_2.conf

@@ -1,6 +1,8 @@
 [global]
 # Avoid becoming the Grandmaster
 priority1 255
+priority2 254
+
 # Converge faster when time jumps
 step_threshold 1
 ## AES67 Profile options
@@ -8,4 +10,6 @@ step_threshold 1
 logSyncInterval -3
 # QoS
 dscp_event 46
-dscp_general 34
+dscp_general 34
+
+tx_timestamp_timeout 20