Advice on aes67-linux-daemon with Raspberry Pi OS and Raspberry Pi 5 (16 GB) + Ardour

[SM0VXI]

Hello

Is there someone who successfully run aes67-linux-daemon on Raspberry Pi OS (possibly in combination with Ardour (8.11)) who can share their experience in getting there step by step? Or if someone knows of a more production ready Ravenna/AES67 solution for RPI OS, like a pre-installed downloadable image, or installation packages?

I have a Raspberry Pi 5 (16 GB) running 64-bit Raspberry Pi OS (Debian version: 12 (bookworm), Kernel version: 6.6). I followed How to build and setup the daemon, it launches, I can play back 24 channels of audio (from Ardour DAW) and receive it on a Dante device. But the RPI CPU starts running at about 85-100% load with lots of x runs (according to Ardour built-in CPU indicator) as soon as I select Merging RAVENNA as ALSA audio output in Ardour. Further, I'm unable to increase the buffer size in Ardour beyond 192 samples when Merging RAVENNA is selected as output device. Is this due to maximum value of tic_frame_size_at_1fs being 192?

scaling_governor is set to to "performance" on cpu0 - cpu3, and kernel.perf_cpu_time_max_percent=0. Pulse Audio does not seem to be running. ./daemon-test -p exits with code: 0 and *** No errors detected.
./run_test.sh S24_3LE 48000 24 5 fails, and so does ./run_latency_test.sh S24_3LE 48000 24 60 192.

Any advice for a sound technician? Should I abandon trying to run aes67-linux-daemon with Ardour on RPI 5?