From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Clemens Ladisch" <cladisch@fastmail.net>
Subject: Re: Setting audio channels on ICH5 with SALSA
Date: Thu, 12 Jul 2007 08:36:04 +0200
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To: Fausto Carvalho Marques SIlva <fausto@tse.gov.br>, alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Fausto Carvalho Marques SIlva wrote:
> >Setting audio channels on ICH5 with SALSA generates and: EINVAL
> >Numbers of channels is 1.

The ICH5 AC97 controller does not support mono output; you must use at
least a stereo stream.

> Even getting the number of avaiable audio channels i get error: EINVAL

What function did you try to use?

> Debuging gets me to:
> 
> SNDRV_PCM_HW_PARAM_CHANNELS
> params->intervals[2] =  {min = 2, max = 6, ...

It supports 2, 4 or 6 channels; this is not a single value.


HTH
Clemens