From:	Chris Kello <kello AT cnbc DOT cmu DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	allegro sound recording problem
Date:	Tue, 29 Sep 1998 09:50:10 -0400
Organization:	Carnegie Mellon Univ. -- Computer Science Dept.
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Message-ID:	<3610E591.622C32FB@cnbc.cmu.edu>
References:	<36110A59 DOT 424D AT post DOT tau DOT ac DOT il>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I am recording from a microphone using allegro's WIP
start_sound_input and read_sound_input routines.  I have
a true SB16 sound card (not a compatible).

The wave form is saved as 16-bit unsigned, and I am
converting it to 16-bit signed by subtracting 0x80 to each
byte.  I am saving it as a VOC file (long story why I'm
using this format, just work with me).  When I listen
to one of my VOC  files in a standard wave editor, it sounds
OK, except there is this overlay of static.  The static is not
from the mic or wave editor because I can make VOC recordings
from other programs just fine.

Anyone know where this static might be coming from?  I thought
it might be my conversion to VOC format, but I've tried a bunch
of different tweaks (e.g., leaving it unsigned), and I can't get it
to work.

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