Studio Technologies 55 2005 - Manual (Page 30)

Model 55/56 User Guide Issue 5, August 2005
Studio Technologies, Inc. Page 30
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 programmed 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 some-
what 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 +15 Vdc 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.