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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Mac sounds to Sparc
Message-ID: <1991Mar27.180045.15689@eng.umd.edu>
Date: 27 Mar 91 18:00:45 GMT
References: <1991Mar27.015629.9536@oracle.com>
Sender: news@eng.umd.edu (C-News)
Organization: College of Engineering, Maryversity of Uniland, College Park
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In article <1991Mar27.015629.9536@oracle.com> dpawson@oracle.com () writes:
>Hey folks,
>   Sorry - I'm sure this has been covered before, but I never was particularly
>interested in the past.  Does anybody have any experience playing Mac sampled
>sounds on a Sparc?  If so, please drop me a note telling me what I am missing.
>I sampled at 7.4 khz on the Mac, then transferred to a Sparc using binary mode
>ftp.  When I play back, my sounds are *very* loud, and while the true message
>is barely audible in the background, it sounds remarkably like a vacuum 
>cleaner.

A guess:  Mac sounds are in 'offset binary'-- the position of the speaker
changes continuously as you move from 0 to 255.  Sparc sounds are probably
in two's complement, which would mean that the speaker position would change
continuously from 0 to 127, with a discontinuity at 128 (-128), and then move
continuously from 128 (-128) to 255 (-1).  Try subtracting 128 from each byte
in the mac file.
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
     .sig under construction, like the rest of this campus.