Dont need to care about this quesiton. I tried test it like, open driver 4 times and each driver call kcontrol functions. And then i can see the description mean. Thanks for all. 2019. 1. 7. 오후 12:12, 박진수 <park870130@xxxxxxxxx> 작성: > 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 _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user