bobby@bobby-ubuntu:/media/mystuff/new pics/vid 2$ lsof /dev/snd/* /dev/dsp*
COMMAND    PID  USER   FD   TYPE DEVICE SIZE NODE NAME
mixer_app 4962 bobby   17u   CHR  116,7      8129 /dev/snd/controlC0
bobby@bobby-ubuntu:/media/mystuff/new pics/vid 2$