Hi, On Wednesday 20 December 2006 21:06, Hans Fugal wrote: > On OS X on the MacBook, which has two input sources (mic and line in) > and one output source. > Am I missing something obvious? Has anyone else had this trouble? > I believe this has to do with the new way in which the MacBook handles its output and input. You have to create an "Aggregate Device", combining the input and output module, in the Audio/MIDI setup panel. Then you should be able to start JACK using this Aggregate Device, and have both input and output. I had to do the same to get SuperCollider to use both input and output. sincerely, Marije