update the readme

README.md

@@ -1,3 +1,6 @@
+# good to know
+with pipewire-aes67 only sources are announced with sap, this means streams from other devices just 'show up' 
+
 # Prerequisites
 sudo rpi-update
 sudo apt install pipewire linuxptp
@@ -6,13 +9,17 @@ sudo apt install pipewire linuxptp
 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
+# start ptp
+sudo ptp4l -mq -i eth0 -f aes67.conf
+also try:
+sudo ptp4l -i eth0 -s -l 7 -m -q
+TODO: try to use cm4 io board for clock sync
 
 # make a copy of pipewire setup file 
+mkdir -p ~/.config/pipewire/
 sudo cp /usr/share/pipewire/pipewire-aes67.conf ~/.config/pipewire/
 
+
 # start pipewire
 pipewire-aes67
 
@@ -22,8 +29,12 @@ 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
+pw-link stream_box1:receive_CH1 alsa_output.usb-0b0e_Jabra_SPEAK_410_USB_08C8C2AE9777x011200-00.analog-stereo:playback_FL
+
+systemctl --user status pipewire
+should not show broken pipe
+additional logs: journalctl -xe | grep pipewire 
+
 
 # show links
 pw-link -l