dfgas@p31000:~$ lsof /dev/dsp* /dev/snd/* # lists all apps using soundcard #OSS uses /dev/dsp*   alsa uses /dev/snd/*
COMMAND    PID  USER   FD   TYPE DEVICE SIZE  NODE NAME
mixer_app 5306 dfgas   18u   CHR  116,6      13939 /dev/snd/controlC0
xmms      5959 dfgas  mem    CHR  116,4      13911 /dev/snd/pcmC0D0p
xmms      5959 dfgas    8u   CHR  116,6      13939 /dev/snd/controlC0
xmms      5959 dfgas   11r   CHR  116,2      13605 /dev/snd/timer
xmms      5959 dfgas   12u   CHR  116,4      13911 /dev/snd/pcmC0D0p
dfgas@p31000:~$