Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site tymix.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!allegra!oliveb!tymix!granvold
From: granvold@tymix.UUCP (Tom Granvold)
Newsgroups: net.music.synth,net.games.video
Subject: Re: Marble Madness & FM Music Synthesis
Message-ID: <514@tymix.UUCP>
Date: Fri, 13-Sep-85 18:13:34 EDT
Article-I.D.: tymix.514
Posted: Fri Sep 13 18:13:34 1985
Date-Received: Sat, 14-Sep-85 17:06:35 EDT
References: <2614@ihnss.UUCP>
Reply-To: granvold@tymix.UUCP (Tom Granvold)
Distribution: net.music.synth,net.games.video
Organization: Tymnet Inc., Cupertino CA
Lines: 15
Keywords: Amiga sound chip set
Xref: watmath net.music.synth:491 net.games.video:483

-
    I have found out some things about the Amiga sound hardware. Basically
the Amiga has four 8-bit D/A converters. This is how all the sound on the
Amiga is generated. Apparently there is a DMA channel, maybe more than one,
that will fetch the digital data and feed it to the D/A, releaving the CPU
chip from doing it. Someplace either in the operating system or one of the
custon chips is support for controlling the envelope. I hope to know more
of the details when I get to see the documentation. By the way, some of
the demo sounds for the Amiga were created by an add on A/D converter.

    It doesn't sound like there is any possibility of doing FM
synthesis on the Amiga.

Tom Granvold
ucbvax!allegra!tymix!granvold