On Tue, Jan 19, 2010 at 09:35:10PM +0800, Raul Xiong wrote: > Basically, my requirment is: There are two modes: ModeA and ModeB. I'd like > application to set this mode before it begin playing. If you have other > better methods to reach this requirment, it's also welcome. Thanks. Why not just expose a regular control for this and store the value in your private data? _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel