Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!att!cbnewsl!bonnie!rbr
From: rbr@bonnie.ATT.COM (4197,ATTT)
Newsgroups: comp.sys.tandy
Subject: Re: SOUND OUTPUT FOR TANDY
Message-ID: <1990Nov27.132214.7533@cbnewsl.att.com>
Date: 27 Nov 90 13:22:14 GMT
References: <11569@j.cc.purdue.edu>
Sender: @cbnewsl.att.com
Reply-To: rbr@bonnie.ATT.COM (Bob Rager)
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Organization: AT&T FSAT
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In article <11569@j.cc.purdue.edu> zhou@brazil.psych.purdue.edu (Albert Zhou) writes:
>Tandy TL1000 and SL1000 (maybe some other models too) have fairly good sound  
>quality when you use sound and music application programs. However, has anybody
>ever tried to program it? In standard PC, it's very easy to control the internalspeaker, but you don't satisfactory sound quality. I suppose in Tandy there is
>a D/A to control the speaker which is done by hardware interrupts. Any comments
>and information are welcome.

The TANDY 1000's have a 3 channel (voice) sound chip that can be
accessed via BASIC (ugh!) or by any language via a port.  I don't
remember the port number but RS has a book "TANDY Graphics and Sound"
that descibes things pretty well. I have tried all the BASIC programs
for sound and they work pretty good when I remember to use "MODE SLOW".

What I haven't seen is information on how to use the built-in
Digital-Analog-Controller (DAC).  I would be interested in seeing some
source (C language ) examples that use the DAC.  

Hope this helps.

Bob Rager