[Alsa-user] It plays tracks but I hear nothing ...

[RKTMB M A <mra...@fr...>]

Hi everybody ,
I got :
alsa-drivers/lib/utils 0.9.6
Linux 2.4.21 / slackware 9
Card: VIA 8235
Chip: Analog Devices AD1980

and lsmod gives :
snd-seq-oss            29952   0  (unused)
snd-seq-midi-event      3904   0  [snd-seq-oss]
snd-seq                40816   2  [snd-seq-oss snd-seq-midi-event]
snd-pcm-oss            38788   1
snd-mixer-oss          13592   0  [snd-pcm-oss]
snd-via82xx            13632   2
snd-pcm                65856   0  [snd-pcm-oss snd-via82xx]
snd-timer              15812   0  [snd-seq snd-pcm]
snd-mpu401-uart         3696   0  [snd-via82xx]
snd-rawmidi            14656   0  [snd-mpu401-uart]
snd-seq-device          4372   0  [snd-seq-oss snd-seq snd-rawmidi]
snd-ac97-codec         41688   0  [snd-via82xx]
snd                    34084   1  [snd-seq-oss snd-seq-midi-event snd-seq 
snd-pcm-oss snd-mixer-oss snd-via82xx snd-pcm snd-timer snd-mpu401-uart 
snd-rawmidi snd-seq-device snd-ac97-codec]
snd-page-alloc          6868   0  [snd-via82xx snd-pcm]
soundcore               4356   6  [snd]

when i run any software to read i music file ( mp3 and ogg ) i see it plays 
the file but i hear nothing .
i already put all alsamixer switches to maximum ....
i 4 times read the documentation and dont know what to do .. would you help me 
?