Thanks very much Headacher for fast and reliable answer !
can't find more useful stuff than that now, sorry.
I finally managed to blacklist the module I was using the wrong name
for asoundconf: it's probably one of them ubuntu/debian specific commands.
try this instead:
OK thanks for the tips !
A soundcard named audio? that has got to be one of the worst names ever.
Actually I (try to) use a stupid external USB 5.1 soundcard for which the constructor does not support linux drivers (Hercules Gamesurround MusePocket USB LT).
It is recognized since Kernel 2.6.20 and works in stereo mode.
If someone knows how to activate and emulate 5.1 channels with this card please tell !!
I found that : http://www.spinics.net/lists/alsa-devel/msg00303.html
but have no idea how to "fix a mixer map"