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Chapter 8
Using the GT-8 with External MIDI Devices Connected
What Can You Do with MIDI?
You can perform the following operations using MIDI with
the GT-8.
* The use of MIDI requires that the MIDI channels of the
connected devices match. If the MIDI channel settings are not
correct, the GT-8 will be unable to exchange data with other
MIDI devices.
Operating From the GT-8
Outputting Program Change Messages
When a patch is selected on the GT-8, a Program Change
message corresponding to the patch number is transmitted
simultaneously. The external MIDI device then switches its
settings according to the Program Change message it
receives.
fig.08-010
MIDI IN
MIDI OUT
Outputting Control Change Messages
Data describing the actions of the CTL pedal, EXP pedal, EXP
pedal switch, and external devices connected to the SUB EXP
PEDAL/SUB CTL 1, 2 jack are output as Control Change
messages. Such messages can be used to (among other
things) manipulate the parameters of an external MIDI
device.
Transmitting Data
You can use Exclusive messages to transmit the settings for
effect sounds and other content stored in the GT-8 to other
MIDI devices. For example, you can provide another GT-8
with the same settings, and save effect sound settings to a
sequencer or other device.
Remotely Controlling the GT-8 Using
an External MIDI Device
Switching Patch Numbers
When the GT-8 receive Program Change messages from the
external MIDI device, its patches are simultaneously
switched.
You can set up the correspondence between MIDI Program
Change messages and the GT-8's patches using the Program
Change Map (p. 83). You may need to work on these
correspondences when you want to line up some effects in
combination with other MIDI devices.
The connections shown in the figure below are for a
sequencer automatically performing the backing as a guitar
is being played. The patches are switched automatically
when the program numbers corresponding to the patches are
input along with the performance data at the points where
you have determined the GT-8 patches are to be switched.
fig.08-020
MIDI OUT
MIDI IN
Receiving Control Change Messages
You can control specified parameters during a performance
by having the GT-8 receive Control Change messages.
Parameters to be controlled are set with Assign Variable (pp.
57).
Receiving Data
The GT-8 can receive data transmitted from another GT-8, as
well as data that's been stored on a sequencer.
79
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