Q:
What is the difference between the Default Output and System Output audio units?
A: The System Output unit (kAudioUnitSubType_SystemOutput ) is for alerts and user interface sound effects. The Default Output unit (kAudioUnitSubType_DefaultOutput ) is for all other audio output.
Using the Audio MIDI Setup application (in the Utilities folder), a user can direct the output of each of these audio units separately.
For more information on these Mac OS X audio units, refer to the headers in the Audio Unit framework (AudioUnit.framework ).
Document Revision History
Date |
Notes |
2008-08-21 |
First Version |
Posted: 2008-08-21
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