Studio Technologies 55 2002 - Manual (Page 35)

Model 55/56 User Guide Issue 4, June 2002
Studio Technologies, Inc. Page 35
Appendix A
Controlling the Model 55
The Model 55 Central Controller uses MIDI
system-exclusive messages to control all
functions. The Model 56 Control Console
is programmed to generate a subset of
what the Model 55 is capable of doing. By
using standard MIDI messages, the Model
55 can be used for a wide range of special
applications. Any device that can be pro-
grammed to send system-exclusive MIDI
messages can be used to control the
Model 55.
All MIDI messages to be acted upon are
system-exclusive type (F0H). No channel
mode, system common, or system real
time messages are utilized. Studio Tech-
nologies, Inc. manufacturer’s ID number is
00H 00H 56H. The Model 55’s product
device ID number is 02H.
Note that the 5-pin connector on the
Model 55’s back panel is wired somewhat
differently from a standard MIDI input.
While pins 4 and 5 meet the MIDI standard,
the three remaining pins are implemented
for use by the Model 56. Pin 1 supplies
+15Vdc power, pin 2 is shield (ground),
and pin 3 is communications audio input.
If you’re connecting your own controller,
such as a computer’s MIDI interface, you
might be concerned about the DC power
on pin 1. Because the MIDI standard
doesn’t use this pin, it is highly unlikely
that it will be connected inside your con-
troller, so there’s little chance of the DC
causing damage. To be safe, you can use
a MIDI cable with only two or three wires
implemented.
The following pages provide a detailed list
of all Model 55 system-exclusive MIDI
messages.