I think you should try changing the pop-up menu to the left of the frequency one to 8 channels. Or something. The system may make a choice for 2 channels for you which your unit also supports, and then ChucK can't do that choice. Hans On 19 Jul 2010, at 22:54, Patrick Guido wrote: > what should I do in audio midi settings: http://grab.by/5uYO ?