Samuel Theobald wrote:
> I'm trying to get my Turtle Beach Santa Cruz (cs46xx) to record 2 channels
> and playback 4 channels (front & rear) simultaneously with jack (using
> qjackctl to get jack going)
>
> My sound card works fine in 2 channel capture, 2 channel playback using hw0.
> The driver doesn't let me use 4 channels with hw0.
>
> With the following .asoundrc I can get it to playback in 4 channels.
> ------------ .asoundrc --------------
> pcm.quad {
> type route
> slave.pcm "quad-setup"
> ttable.0.0 1
> ttable.1.1 1
> ttable.2.2 1
> ttable.3.3 1
> ...
>
> trying to enable capture using (default), hw0 or hw0,0 causes the following
> error:
> ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to
> playback-only mode
Your "quad" device tries to use four channels, but your sound card does
not support four channels when capturing.
To have different configurations in the playback and capture directions,
use the asym plugin like this:
pcm.four_and_two {
type asym
playback.pcm quad
capture.pcm "hw:0"
}
HTH
Clemens
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