Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!bbn!apple!claris!scott
From: scott@claris.com (Scott Lindsey)
Newsgroups: comp.sys.apple
Subject: Re: Mac and GS sounds
Message-ID: <8981@claris.com>
Date: 28 Feb 89 02:54:24 GMT
References: <8902270353.aa06297@SMOKE.BRL.MIL>
Organization: Claris Corporation, Mountain View CA
Lines: 23

From article <8902270353.aa06297@SMOKE.BRL.MIL>, by AWCTTYPA@UIAMVS.BITNET ("David A. Lyons"):

>>the same format as the gs, so porting sound from the Mac to GS would be
>>possible.  Anybody have any info, knowledge, or just plain cold hard facts
>>about this?
> 
> On format that is sometimes used on both machines is just a plain
> sequence of uncompressed bytes, from 1 to 255.  That format is no
> problem--I've moved sounds between systems before.  (Just from Mac
> to GS, I guess, but the other direction shouldn't be much harder.)
 
There is a slight problem with the sound format that I ran into.  It has to
do with the amplitude notation.  A 0 byte in tells the generator to stop,
so if you have any 0's in the data, it gets distorted (this can be remedied
by changing the 0's to 1's).  Also, a value of 0x80 is zero amplitude (rather
than 0 or 1), so any trailing 0's in the sound should be converted to 0x80's.


-- 
Scott Lindsey, wombat | UUCP: {ames,apple,portal,sun,voder}!claris!scott
Product Development   | Internet:  scott@claris.com  |  AppleLink: LINDSEY1
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