On Tue, 23 Jun 2009 16:27:34 -0700 (PDT)
"S. Aguinaga" <[email protected]> wrote:
> Hello,
>
> *A wave file plays on the built-in audio "aplay -v waveoutput.wave" without
> issues, but if I route this to my Layla3G card using the command:
> "aplay -v -D layla3g waveoutput.wave" this is the output/error message:
>
> Playing WAVE 'waveoutput.wave' : Signed 16 bit Little Endian, Rate 22050
> Hz, Mono
> aplay: set_params:959: Channels count non available
It happens because the card does not support mono S16_LE. It must be stereo.
> I've searched the forums and while I have found a work-around, I haven't
> found a satisfactory answer online that points to my error ( which I presume
> is with my .asoundrc file). Here is my ~/.asoundrc file (bellow), to it I
> added the "channels 2" line and rebooted the system, but it still fails.
There's no need to reboot: .asoundrc is read each time an app is loaded.
> ** If I try the following, it works: aplay -D plughw:1,0 waveoutput.wave
Yes, with plug it either converts the data to stereo or S32_LE.
> *** The purpose of this task is to figure out what the maximum output voltage
> of the Echo Layla3G is. Do any of you have a suggestion to accomplish this
> in a more elegant way?
>
>
> ## my .asoundrc file ######################
> # soundcard and device to use
> pcm.layla3g {
> type hw
> card 1
> device 0
> channels 2
> }
Try this:
pcm.layla3g {
type plug
slave.pcm "hw:1"
}
ctl.gina3g {
type hw
card 0
}
--
Giuliano.
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