Thanks a mil Ralph! That did it. Is it just me, or are some of the (IMO) basic controls pretty well buried in OS X? -Lavode On Apr 7, 2004, at 10:06 PM, Ralph Garrett wrote: > Go to the Audio MIDI setup app in applications>utilitites. > Select the Audio Devices tab. In the lower left corner there is a box > marked thru to the right of the master volume control. Make sure it's > checked.