http://www.macnn.com/articles/03/07/03/detour.provides/
Detour provides control over audio output
updated 12:55 pm EDT, Thu July 3, 2003
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Rogue Amoeba Software has released , its newest audio utility for Mac OS X. Detour provides the ability to choose the audio output device and relative volume for all of your applications - "a capability never before seen on OS X." From serious audio pros to the computer music lover, Detour provides the control over your sound that you've always wanted. For example, you can send iTunes music and DVD Player sound to an external set of speakers or headphones while keeping noises from iChat and other programs coming out of the computer's smaller built-in speaker. Detour can also be used to lower the volume of some applications relative to others.
