Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!pt.cs.cmu.edu!rochester!rit!tropix!moscom!ur-valhalla!uhura.cc.rochester.edu!sunybcs!rutgers!cs.utexas.edu!husc6!rice!uw-beaver!blake!wiml
From: wiml@blake.acs.washington.edu (William Lewis)
Newsgroups: comp.music
Subject: Re: MIDI specs...
Message-ID: <2631@blake.acs.washington.edu>
Date: 8 Aug 89 04:00:04 GMT
References: <5791@rpi.edu>
Reply-To: wiml@blake.acs.washington.edu (William Lewis)
Organization: University of Washington, Seattle
Lines: 18

In article <5791@rpi.edu> fargo@pawl.rpi.edu (Irwin M. Fargo) writes:
>I'm doing some development work and need the design specifications for MIDI.
>
>If anyone can direct me to, or send me, the circuit diagrams, etc., I'd really
>appreciate it.

   The most recent issue of /Radio-Electronics/ (August 1989, Vol 60 No. 8)
has an article on MIDI which seems to be complete enough to build a MIDI
system (if you are patient...). Includes voltage levels and (I think) a
schematic of a driver circuit; but it focuses mainly on the format of the
data sent along the line and how individual devices should respond to it.
  BTW, anyone who actually uses a MIDI system -- from this article it looks
as if only sixteen instruments can be connected to any MIDI loop. (only
4 bits are available to specify instrument number.) This includes things like
keyboards, sequencers, &c. Is this true?

   --- phelliax
       "dum dum de da dum dum, dum de da DUM dum de da!"