RE: [Alsa-user] FW: Ice 1712 problems

[Bobby Acha]

Title: RE: [Alsa-user] FW: Ice 1712 problems

I am able to play and record using plughw:0,0.  My main issue is that I am only able to record the first 2 channels with this solution.  I need to record all 4 input channels and I have no idea how to do this.  I figured I would play with the .asoundrc file and that has led to nothing but more confusion for me.  How do I specify recording from channels 3&4 using the plughw solution?

Thanks

-Bobby

Senior Systems Engineer
Colorado Public Radio
Englewood, CO 80112
303 871 9191 x252




-----Original Message-----
From: Lee Revell [mailto:[EMAIL PROTECTED]]
Sent: Mon 3/20/2006 4:49 PM
To: Bobby Acha
Cc: alsa-user@lists.sourceforge.net
Subject: Re: [Alsa-user] FW: Ice 1712 problems

On Mon, 2006-03-20 at 16:04 -0700, Bobby Acha wrote:
>
> Hi all,
>
>
>
>   Here is my problem.  I have set up a Delta 44 (ice1712) soundcard.
> It is functioning, but I am having great difficulty in setting up the
> ability to record or play from multiple pairs of channels at the same
> time.  I also am having a hard time playing directly to the hw:0,0
> device.  I am however able to use plughw:0,0.
>
>
>
> [EMAIL PROTECTED] ~]# aplay test.wav
>
> Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
> Stereo Aborted by signal Interrupt...
>
>
>
>
>
> [EMAIL PROTECTED] ~]# aplay -D hw:0,0 test.wav Playing WAVE
> 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
>
> aplay: set_params:896: Sample format non available
>
This won't work as you are trying to play an S16_LE .wav file to the hw
device which only supports S32_LE.  You must use plughw to play
normal .wav files on this device.
>
>
> [EMAIL PROTECTED] ~]# arecord -D ch12 test.wav ALSA lib
> pcm_dshare.c:613:(snd_pcm_dshare_open) The dshare plugin supports only
> playback stream
>
> arecord: main:544: audio open error: Invalid argument
>
I think you want dsnoop not dshare here.
>
>  [EMAIL PROTECTED] ~]# arecord -D hw:0,0 test.wav Recording WAVE
> 'test.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
>
> arecord: set_params:896: Sample format non available
>
See above - you are trying to capture 8 bit audio from the hw: device
which only supports S32_LE.  Plughw should work.

> Following is my asound.conf file.  I have checked sing aplay and
> arecord with the -l flag, and the conf file is being used.
>
>
>
>
>
> pcm_slave.delta {
>
>   pcm "hw:0,0"
>
>   channels 4
>
>   rate 44100
>
>   buffer_size 4096
>
>   period_size 2048
>
>   periods 0
>
>   period_time 0
>
> }
>
>
>
> pcm.ch12 {
>
>   type dshare
>
>   ipc_key 47110815
>
>   slave delta
>
>   bindings.0 0
>
>   bindings.1 1
>
> }
>
>
>
> pcm.ch34 {
>
>   type dshare
>
>   ipc_key 47110815
>
>   slave delta
>
>   bindings.0 2
>
>   bindings.1 3
>
> }
>
>
>
>
>
> I have also tried using the pcm as "plughw:0,0".
>
>
>
>
>
> [EMAIL PROTECTED] ~]# aplay -D ch12 test.wav ALSA lib
> pcm_dshare.c:687:(snd_pcm_dshare_open) dshare plugin can be only
> connected to hw plugin Segmentation fault
>
>
>
> Any help would be greatly appreciated.
>
>
>
> Thanks,
>
>
>
> Bobby
>
>
>
> Senior Systems Engineer
>
> Colorado Public Radio
>
> Englewood, CO 80012
>
> 303 871 9191 x 252
>
>
>
>