Hi Fons, Are you using a RT kernel at all? Onboard i2s soundcards sound like a better option for multichannel, alas the RPi only does 2 channels... unless you do some voodoo like transmitting 256 bits over two channels with a hardware divider... similar to how a certain multichannel card does it ;-)
Cheers! Chris Obbard 64 Studio Ltd On Sat, 7 Jul 2018 at 16:48, Fons Adriaensen <f...@linuxaudio.org> wrote: > Hello all, > > Has anyone tried using multichannel USB audio on a Raspberry 3B+ ? > > It seems to work perfectly (using zita-alsa-pcmi) with stereo cards. > > When I try my RME Babyface (12 in, 12 out) in CC mode, the device > opens without problems, but then Alsa_pcmi::pcm_wait() times out > waiting for the poll fd to become ready. Timeout in pcm_wait() is > 1000 milliseconds. > > The same seems to happen with Jackd, which uses similar code. > > Is there anything in the Pi's system or configuration that > excludes multichannel cards ? > > Ciao, > > -- > FA > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev@lists.linuxaudio.org > https://lists.linuxaudio.org/listinfo/linux-audio-dev >
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