On 22 Jun 2009, at 14:00, 宋宝华 <21cnbao@xxxxxxxxx> wrote: > So, does it mean I need to support both single and pair since we > don't know how users will use it? If I only create 4 pairs, how > could users control channels not in any pair? You only need to do stereo, like I said users can still control the individual channels. Creating stereo controls only adds new ways of controlling things, it doesn't remove any capabilities. >_______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel