Inside Macintosh: Sound Manager

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Defining a Sound Input Interrupt Routine

The interruptRoutine field of the sound input parameter block contains the address of a routine that executes when the internal buffers of an asynchronous recording device are filled. The internal buffers contain raw sound samples taken directly from the input device. The interrupt routine can modify the samples in the buffer in any way it requires. The processed samples are then written to the application buffer. If compression is enabled, the modified data is compressed after your interrupt routine operates on the samples and before the samples are written to the application buffer.

Your sound input interrupt routine is always called at interrupt time, so it should not call routines that might allocate or move memory or assume that A5 is set up. For more information on sound input interrupt routines, see "Sound Input Interrupt Routines" .

Inside Macintosh: Sound Manager

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