[alsa-devel] Strange behaviour in snd-usb-cayak with Audio4DJ
pedrib at gmail.com
Tue Feb 16 18:10:37 CET 2010
On 16 February 2010 16:44, Daniel Mack <daniel at caiaq.de> wrote:
> On Tue, Feb 16, 2010 at 04:35:29PM +0000, Pedro Ribeiro wrote:
>> ALSA information script output is here
>> and my .asoundrc is here http://pastebin.com/m3f70572d
>> Currently my .asoundrc has 4 devices:
>> - Audio4DJ_A (combines channels 1 and 2)
>> - Audio4DJ_B (combines channels 3 and 4)
>> - Audio4DJ (combines Audio4DJ_A and Audio4DJ_B)
>> - ttable is a device for JACK according to this
>> My goal is to have a separate ALSA soundcard for each pair of
>> channels, an ALSA soundcard for 4 channels and a JACK device for all 4
>> Running speaker-test -c2 -D plughw:Audio4DJ,0,X -twav -l1
>> with X=0 and X=1 correctly outputs to each channel. Also,
>> pcm.Audio4DJ_A and pcm.Audio4DJ_B correctly work through both ALSA and
>> JACK for each pair of channels.
>> However, if I try to use the pcm.Audio4DJ (which combines both
>> pcm.Audio4DJ_A and pcm.Audio4DJ_B), I get correct output through
>> channels 1 and 2, but channels 3 and 4 have a lot of garbage - you can
>> hear the track playing but it is at a very high pitch and distorted.
> Could you first try to playback audio without all your quirks using the
> following commands, please.
> For channel 1&2: aplay -D plughw:Audio4DJ,0,0 test.wav
> For channel 3&4: aplay -D plughw:Audio4DJ,0,1 test.wav
> If that works, we can exclude driver issues. I'm very confident that
> will work btw, as this is the way I tested the driver.
> I admittedly have no clue about JACK ;)
Thank you for the quick reply!
it works perfectly! I have no clue why the combined device produces
such garbage when playing on channels 3 and 4.
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