I already read the alsa documents. And in there alsa high level control interface reduce overhead accessing the real controls in kernel driver. Could u explain about this with some examples? When I just compare ctl vs hctl, ctl is more faster than hctl. And use less memory. I dont know what is advantage for that. Thanks. Btw. Is this correct mail address? If not please let me know. _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user