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From: dr_d@sftig.UUCP (D.Donahue)
Newsgroups: net.music.synth,net.games.video
Subject: Re: Marble Madness & FM Music Synthesis
Message-ID: <590@sftig.UUCP>
Date: Mon, 16-Sep-85 09:57:30 EDT
Article-I.D.: sftig.590
Posted: Mon Sep 16 09:57:30 1985
Date-Received: Tue, 17-Sep-85 06:16:18 EDT
References: <2614@ihnss.UUCP> <267@weitek.UUCP>
Organization: AT&T Bell Laboratories, Summit, NJ
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Xref: watmath net.music.synth:503 net.games.video:485


> >  (2) Someone posted a rumor that the MM arcade game uses the
> >      Amiga's sound chip set.  If so, does that imply that Amiga
> >      supports digital FM synthesis?  Wow!  Actually, an LSI
> >      FM chip should be pretty easy to build.
> Your right. FM chips are not that hard to build. However, Yamaha
> has the basic patent on FM sound generation. Atari's lawyers
> didn't want to fight it so they just bought the chips from Yamaha.

Mahar,

	I'm not certain what it is that you are refering to as far as Yamahas
ownership with respect to FM sound generation. As far FM patenting is concerned,
John Chowing of Stanfords CCRMA is the one who, perhaps didn't conceive of the
idea, actively purued and developed the process of Frequency Modulated Sound
Generation. The same John Chowning, not Yamaha, is the one who holds any 
patents having to do with FM Sound Generation.

						Doug Donahue
						AT&T Information Systems
						attunix!dr_d