> Hi again,
> Sorry about the delay in replying.
> Yes, when I type: prtconf -D | grep audio
> the system returns : " lrwxrwxrwx: not found"
> 
> When I type : "grep pci10de,ea /etc/driver_aliases
> audio810 "pci10de,ea"  I don't get any error messages
> (maybe I'm not supposed to),

That's OK.  This entry tells the system to use the
audio810 driver with your mainboard's audio hardware.

> but when I enter:
> "mixerctl -v"   the system returns :" audio810: not
> found"

I'm not yet sure what's wrong with your system setup,
but the response "audio810: not found" is not the
expected response for the mixerctl command.

Try running it as:

 /usr/sbin/mixerctl -v -d /dev/sound/0

and 

 /usr/sbin/mixerctl -v -d /dev/sound/1


This should tell you the type of audio device (and it's
capabilities) that is detected as sound device #0 and
sound device #1 in your system.


> What I don't understand is why the system does not
> load the driver during installation if it is
> available.


I think that the system does in fact load some audio
device driver when you try to open /dev/audio, but somehow
the audio device driver refuses to play 8khz u-Law encoded
mono sound from file /usr/demo/SOUND/sounds/whistle.au

Possible explanations:

- the /dev/audio device points to some kind of USB microphone,
  which can only be used for recording,  not for playback

- /dev/audio points to some playback capable audio device,
  but it does not support 8khz u-Law mono sound format
 
 
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