initial commit

90-pipewire-aes67-ptp.rules

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+# This file was installed by PipeWire project for its pipewire-aes67
+#
+# This is used to give readonly access to the PTP hardware clock.
+# PipeWire uses this to follow PTP grandmaster time. It should be synced by another service
+#
+KERNEL=="ptp[0-9]*", MODE="0644"

README.md

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+# Prerequisites
+sudo rpi-update
+sudo apt install pipewire linuxptp
+
+# add udev rule
+sudo cp 90-pipewire-aes67-ptp.rules /etc/udev/rules.d/
+sudo udevadm control --reload-rules && sudo udevadm trigger
+
+
+# set up aes67.conf
+ptp4l -mq -i eth0 -f aes67.conf
+
+# make a copy of pipewire setup file 
+sudo cp /usr/share/pipewire/pipewire-aes67.conf ~/.config/pipewire/
+
+# start pipewire
+pipewire-aes67
+
+# show devices
+pw-cli ls Node
+pw-link -o    # List output ports (sources, e.g. rtp-sink)
+pw-link -i    # List input ports (sinks, e.g. Jabra SPEAK 410)
+
+# Attach a monitor
+pw-link rtp-sink:monitor_CH1 alsa_output.usb-0b0e_Jabra_SPEAK_410_USB_08C8C2AE9777x011200-00.analog-stereo:playback_FL
+pw-link rtp-sink:monitor_CH2 alsa_output.usb-0b0e_Jabra_SPEAK_410_USB_08C8C2AE9777x011200-00.analog-stereo:playback_FR
+
+# show links
+pw-link -l
+
+# test
+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

aes67.conf

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+[global]
+# Avoid becoming the Grandmaster
+priority1 255
+# Converge faster when time jumps
+step_threshold 1
+## AES67 Profile options
+# Send Sync messages more often
+logSyncInterval -3
+# QoS
+dscp_event 46
+dscp_general 34