Thanks for your answer. I have tried to use the latest drivers, libs and 
utils, but I get errors with the utils "function snd_ctl_open failed for 
default : Sound protocole is not compatible". What is the version of your 
drivers ? (remember that I have a MDK8.1).
Thank you

Le Lundi 11 Mars 2002 13:57, vous avez écrit :
> Hi,
>
> At Mon, 11 Mar 2002 13:13:07 +0100,
>
> Xavier ALLAMIGEON wrote:
> > I agree with you Werner, but I can't use the rear speakers with ALSA
> > applications such as aplay : the option -D doesn't exist in aplay-0.52
> > and the applications from alsa-utils-0.9.0beta12 give the following error
> > : audio open error ; sound protocole is not compatible. On top of that, I
> > have read that some people use four speakers. Can you help me ?
>
> you need to install ALSA 0.9.0 drivers together with alsa-lib and
> alsa-utils 0.9.0.
> unfortunately there is no compatibility with 0.5.x and 0.9.0, thus you
> need to replace completely all alsa stuffs. that is, you need to
> install alsa-drivers 0.9.0 together with alsa-lib and alsa-utils
> 0.9.0.
>
>
> HTH.
>
> ciao,
>
> Takashi

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