Radivoje Jovanovic wrote: > I am writing custom IOCTL calls for my card. I have made hwdep interface and > set ioctl ops call for it. But, now the question is which device I need to > open in my user space app to talk to correct ioctl? You should use snd_hwdep_open(... "hw:0" ) and snd_hwdep_ioctl(). Regards, Clemens