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HELP PLEASE - Add a sound card to ALSA

Hi there,

I'm using an arm board, S3C2440, with the UDA1341 sound controller. I have the /dev/dsp working properly. Madplay works fine.

Now, I want to use amixer (and other tools from ALSA utils), but I have no soundcard in /proc/asound/cardx to select in amixer. When executing amixer scontrols, it gives:

Code:

[root@arm-linux bin]# ./amixer scontrols ALSA lib control.c:739:(snd_ctl_open_noupdate) Invalid CTL default amixer: Mixer attach default error: No such file or directory

So, does anyone know what is needed to associate /dev/dsp with an ALSA soundcard in /proc/asound/cardx? I gess I need to do modprob, but with what?

For further details, see http://linphone-on-arm.yolasite.com/

Thanks,
Sérgio Gonçalves

Quote:

Originally Posted by TheSergon13 (Post 3875807)

So, does anyone know what is needed to associate /dev/dsp with an ALSA soundcard in /proc/asound/cardx? I gess I need to do modprob, but with what?

Thanks,
Sérgio Gonçalves

Don't know at all if this helps:

Code:

lugo@fido:~$ apt-cache search --full alsa-oss                                      

Package: alsa-oss                                                                  

Priority: optional                                                                

Section: sound                                                                    

Installed-Size: 256                                                                

Maintainer: Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org>      

Architecture: amd64                                                                

Version: 1.0.15-1                                                                  

Depends: libasound2 (>> 1.0.14), libc6 (>= 2.6.1-1)                                

Filename: pool/main/a/alsa-oss/alsa-oss_1.0.15-1_amd64.deb                        

Size: 55036                                                                        

MD5sum: 8f9df26eea6065f8166903c3530f4453                                          

SHA1: 151491611e4ad4a9c4f7138bb1129b658baa548f                                    

SHA256: 9d6be35c2272a8151784dd9f8ca81f5d7de79259533597284c4ef71f8b925345          

Description: ALSA wrapper for OSS applications                                    

 This package contains a program loader, aoss, which wraps                        

 applications written for OSS in a compatibility library,                          

 thus allowing them to work with ALSA.                                            

 .                                                                                

 There are two ways of getting an application to work with                        

 ALSA if the application was written for OSS. The first way                        

 is to load the special ALSA drivers that emulate the OSS                          

 kernel interface; these allow the application to open                            

 /dev/dsp0 and other OSS device files. The second way is                          

 to wrap the application in the libaoss library provided

 in this package; the wrapper causes the application to

 access native ALSA device files such as /dev/snd/pcmC0D0c

 instead of OSS device files.

 .

 Use of the alsa-oss library is recommended over the use of

 OSS-emulation drivers if you want to use ALSA's PCM plugin

 layer.

 .

 ALSA is the Advanced Linux Sound Architecture:

    http://alsa.sourceforge.net

 OSS is the free version of the Open Sound System.

Homepage: http://www.alsa-project.org/

Tag: admin::hardware, interface::commandline, role::program, scope::utility, use::converting, use::playing, works-with::audio

Kernel-level OSS emulation via the snd-pcm-oss and snd-mixer-oss and snd-seq-oss modules

http://alsa.opensrc.org/index.php/OssEmulationIncidentally, in case it was not a typo, it's modprobe with an e.

Hi.

Thank you lugoteehalt for your reply.

Quote:

There are two ways of getting an application to work with
ALSA if the application was written for OSS. The first way
is to load the special ALSA drivers that emulate the OSS
kernel interface; these allow the application to open
/dev/dsp0 and other OSS device files. The second way is
to wrap the application in the libaoss library provided
in this package; the wrapper causes the application to
access native ALSA device files such as /dev/snd/pcmC0D0c
instead of OSS device files.

This gave me an idea to the next step. I gess I need to compile the codec to my UDA1341 sound controller, and that's what I will use to do modprobe.
I only don't understand why do I have to do this if I already have my device /dev/dsp working.... Anyway.... Somebody corrects me if I am wrong.

Thank you again lugoteehalt

Regards,
Sérgio Gonçalves