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From: dyim@athena.mit.edu (Derrick H. Yim)
Newsgroups: comp.sys.mac.programmer,comp.sys.mac.misc
Subject: Tempo feature in SoundEdit
Message-ID: <1990Nov13.005828.14458@athena.mit.edu>
Date: 13 Nov 90 00:58:28 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Reply-To: dyim@athena.mit.edu (Derrick H. Yim)
Organization: Massachusetts Institute of Technology
Lines: 17

Hello everyone out there in Net-Land!

	Has anybody who has used Soundedit (by Farallon) have any guesses at
how the people who wrote it implemented the "Tempo" feature?
	Choosing "Tempo" from the "Effects" (?) menu allows the user to either double or halve (approximately, as far as I can tell) the playback rate
withoutaffecting the pitch.
	I'd eventually like to implement such a feature in hardware, but would
like to first try it out in software on either a Soundedit file or on a 'snd'
resource. If someone could send me some sample code (Mac code preferred, of 
course), an algorythm, or a reference (book, paper, journal, etc.), I'd be
eternally greatful. Thanks.


Derrick Yim
dyim@ahtena.mit.edu

P.S. please reply by e-mail if possible, as I need to do this ASAP.