Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site uw-beaver Path: utzoo!watmath!clyde!cbosgd!ucbvax!decvax!tektronix!uw-beaver!info-mac From: info-mac@uw-beaver Newsgroups: fa.info-mac Subject: Mac/MIDI interface Message-ID: <331@uw-beaver> Date: Mon, 31-Dec-84 17:31:11 EST Article-I.D.: uw-beave.331 Posted: Mon Dec 31 17:31:11 1984 Date-Received: Wed, 2-Jan-85 00:11:34 EST Sender: daemon@uw-beaver Organization: U of Washington Computer Science Lines: 20 From: LEVITT%MIT-OZ@MIT-MC.ARPA I've played with 2 different homebrew versions of a Mac/MIDI interface: 1) Dan Kottke of Apple built a tiny, special cable assembly, including a crystal, diodes, and resistors, which successfully communicated MIDI signals with a Yamaha DX-7 synthesizer with the right serial chip software. Andy Hertzfeld of Apple helped with the software driver. It didn't seem to work with the Roland Jupiter 6 or other synthesizers I tried it on; I don't know if there was a flaw in Kottke's all-passive design, or a problem with that particular kludge assembly. (It required power from one of the external disk drive pins!) 2) Bob Rees, a local friend, did something similar with a more complicated circuit (and presumably less "inside" information). It also worked with a DX-7. Months ago I heard some manufacturer was interested in his design. But I'm not aware of a commercial Mac/MIDI interface yet either; I'm disappointed and impatient.