shenki@serenity:~$ lsof /dev/dsp* /dev/snd/*
COMMAND    PID   USER   FD   TYPE DEVICE SIZE NODE NAME
esd       5226 shenki  mem    CHR 116,16      9253 /dev/snd/pcmC0D0p
esd       5226 shenki    6u   CHR 116,16      9253 /dev/snd/pcmC0D0p
esd       5226 shenki    7r   CHR 116,33      8932 /dev/snd/timer
esd       5226 shenki    8u   CHR  116,0      9271 /dev/snd/controlC0
esd       5230 shenki  mem    CHR 116,16      9253 /dev/snd/pcmC0D0p
esd       5230 shenki    6u   CHR 116,16      9253 /dev/snd/pcmC0D0p
mixer_app 5550 shenki   35u   CHR  116,0      9271 /dev/snd/controlC0