Setting a trigger for sampling

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1 total messages Started by I J Taylor Thu, 29 Oct 1992 11:24

#47

Author: I J Taylor
Date: Thu, 29 Oct 1992 11:24

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Hi,
	I am trying to get the NeXT to sample a sound only when there is a
certain level of sound present (i.e. wait until there is a sound before
sampling it).  I am using the SNDStartRecording() command to sample the 
sound (in the background) and then repeatedly calling the SNDSamplesProcessed()
command to find out when the next sample has been fetched. This would enable me
to look at the data in the Sound Structure to see if its value was greater 
than a certain trigger value before recording the sound properly.
	The problem is that SNDSamplesProcessed() only seems to return the
amount of samples processed so far after a certain amount of sample have been
processed ( i.e. it only returns 0,256,512,768.....etc ).  I want to look at
each sample if possible (or at least every 20th or so).
	Am I on the right lines,  or does anybody know of a better way of doing
this??
	Thanks in advance

			Ian Taylor
			email ijt@uk.ac.cf.cm
A
	I would be

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