Mac OS 8.5 Technote: Part XL

Copyright 1998 by Apple Computer, Inc. All Rights Reserved.

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Inside the System File (Continued)

Sound Manager

The Sound Manager provides facilities for playback and recording of digitized sounds.
  • The siActiveChannels SPBSetDeviceInfo call was not being accepted on 6100, 7100, or 8100 PowerMacs. This has been corrected.

  • It is now possible to change recording quality while recording.

  • Chained calls to SPBRecord now work when the recording buffer size is smaller than the hardware interrupt buffer size.

  • Sound input source settings made in Monitors & Sound are now remembered across boots on 6100, 7100, and 8100 machines.

  • siRecordingQuality now works as expected.

  • The Power Mac 4400/200 always reported that the microphone is not connected regardless of whether it actually was. This problem has been corrected.

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