I think you're looking in the wrong place. What you're seeing pertains to Sonar's processing. If memory serves, that stuff is in the Delta Control ZPanel, and/or in the Sonar section where the chosen card is shown and controled. But I'm not at home, don't go there, so don't trust my Organic RAM. Nick --Original Message Text--- From: John Fioravanti Date: Fri, 9 May 2008 06:13:15 -0400 Message Hi: I'm using the delta 66. When I go into audio options I can't find where to set the bit depth to 24. In sonar 4 it was there. The only thing I find close is, "64 bit double precision engine check box not check." Any ideas? John Fioravanti ----- Original Message -----