7 Jul
2018
7 Jul
'18
7:58 p.m.
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 <fons(a)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
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