[Alsa-user] speaker-test, via8237 and alc655 for a 4 channels sound system?

[laurent m. <sp...@fr...>]

Hi, guys,

I tried yesterday eve to switch my working 2 channels sound system to 4
channels as my hardware is supposed to do. I have a KT600 motherboard
including a via8237 southbridge and an alc655 ac97.
From the alsa 0.98 original driver included in my distro, I upgraded
recently to 1.0.2c (BTW, both works with 2 channels).
I tried to write an asound.conf file ( after reading all the
documentation available on that subject, I can still say that it 's not
crystal clear for my level of knowledge).
I tried also to send sound sample with simple commands like :
    aplay -Dsurround40 xxxx.wav
    aplay -Drear xxxx.wav
Anyway, I've got sound coming only from my front speakers, rears stayed
quiet all the time.
Finally, I found the speaker-test program and gave it a trial. The
program sent sound samples to the speakers, but here also, I was able to
hear sound coming only fronm the front speakers.
Does this program need a special setting in order to work?
If not, what conclusion can I make? Driver not able to support 4
channels with this hardware?
Anyway, any help, clues on previous experience more then welcome!!!
Thanks and regards
Laurent
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