Have a system playing from a Raspberry PI CM4 with cm4 I/o board for ethernet. AesS67 daemon 1.31.
I ran the auto test routine on this AES67 cm4 and it passed ok.
Using a second PI as PTP clock via new d-link gigabit switch. Using MacBook Pro (Big Sur) with Merging/Ravenna Virtual audio device. Everything is locked together and speaker test works, and I can play audio files and RX the streams on the MacBook without clicks or dropouts.
However, the latency is about 1.2 sec!

SDP file from the AES57 sink/playout seems to work:
`v=0
o=- 2831165442 2831165444 IN IP4 192.168.2.40
s=AES67 daemon a8c02802 ALSA Source 0
c=IN IP4 239.255.0.10/15
t=0 0
a=clock-domain:PTPv2 0
m=audio 5004 RTP/AVP 98
c=IN IP4 239.255.0.10/15
a=rtpmap:98 L24/48000/2
a=sync-time:0
a=framecount:48
a=ptime:1
a=mediaclk:direct=0
a=ts-refclk:ptp=IEEE1588-2008:E4-5F-01-FF-FE-23-C2-20:0
a=recvonly

`
I tried not using Merging/Ravenna VAD and tried some command line FFMPEG and gstreamer stuff which works fine
but I always get circa 1.2 sec playback delay.

I also tried using a gstreamer command on the CM4 that is the player and sending to both the local audio output and plughw:RAVENNA at the same time. This works but the latency here is 1.2s, so maybe thats the problem?

Thanks.