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From: DN5@psuvm.psu.edu (D. Jay Newman)
Newsgroups: comp.sys.mac.programmer
Subject: Sound compression
Message-ID: <91163.094049DN5@psuvm.psu.edu>
Date: 12 Jun 91 13:40:49 GMT
Organization: Penn State University
Lines: 26

Hi:

I am writing a language testing program which uses digitized speach.  We
have experimented, and need speach at 22kHz.  Our problem is that the
sound for 50 questions uses over 40 meg of disk!  (And this is for sound
alone, we haven't tried storing the 8-bit color images, yet.)

Does anybody have any good references to sound compression techniques?

Will QuickTime compress sound?  (I've read the announcements, and I didn't
see any sound specific compression, only image compression stuff.)

Are there any commercial products?

We have experimented with the various compression ratios with the Farollan
Sound System (MacRecorder), but none of them had the quality we need for
language testing.

Any help will be appreciated.

Thanks.

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D. Jay Newman          !  That is not dead which can eternal lie
dn5@psuvm.psu.edu      !  And with strange eons even death can die
CBEL--Teaching and Learning Technologies Group