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Chapter 2 Creating Your Own Settings (Patches)
Shifting the Pitch of the
Sound (TRANSPOSE)
On the GI-20, you can shift the pitch, in semitone steps, of
what is output over MIDI relative to which is actually
played. This transposition can be set individually for each
string, and can be any amount from three octaves below the
original pitch to two octaves above it. This function is called
“TRANSPOSE.”
This allows you to perform with open tuning, drop tuning,
and other alternative tunings without having to actually
change the guitar’s own tuning.
1. Turn the PARAMETER knob to “TRANSPOSE.”
fig.02-36
2. Press [TUNER (STRING SEL)] to select the string
whose pitch you want to change.
The string number changes each time you press [TUNER
(STRING)], cycling through ALL → 1 → 2 → 3 → 4 → 5
→ 6 → ALL...
Select “ALL” if setting all of the strings to the same value.
3. After selecting the string whose pitch you want to
change, press [PATCH/VALUE] to change the setting.
You can set the TRANSPOSE settings value in a range
from -36 (down three octaves) to 24 (up two octaves).
fig.02-37
* If notes whose pitches are changed using the TRANSPOSE
function are in registers that are unplayable using MIDI
messages, the MIDI messages in the expressable range above
or below that octave are transmitted. For example, the sound of
the bass’s fourth string (E) lowered by three octaves cannot be
played using MIDI messages, so the MIDI message for the
note lowered two octaves is transmitted instead.
4. Repeat Steps 2 and 3 for any other strings you want to
set.
5. If you want to save the settings, carry out the Write
procedure (p. 26).
* If you do not want to save the settings, turn the
PARAMETER knob to return to “PLAY MODE.”
6. When you have finished making the settings, turn the
PARAMETER knob to return to “PLAY MODE.”
Setting the Range in Which Pitches
Are Changed (BEND RANGE)
The GI-20 can send continuous pitch changes obtained with
techniques such as bending, finger vibrato, tremolo bar
usage, and sliding to an external device. This is done using
MIDI Pitch Bend Change messages.
Setting Bend Range to as large a value as possible will help
enable smooth pitch changes in a wider range. The settable
range varies according to the receiving sound module. For
equipment having a different settable width in the bend up
and down directions, match the setting to the narrowest
value.
About messages that notify the external MIDI
instrument of the Bend Range and prompt change
The setting called Bend Range must be matched up on the
sending and receiving instruments.
The GI-20 normally informs the external MIDI device of the
Bend Range setting on the GI-20, and sends a message
prompting change every time the patch is switched.
This means that the Bend Range value on the sound module
can be set automatically every time the patch is changed
simply by matching the maximum Bend Range value that
can be set on the external MIDI sound module to the GI-20.
The messages used here are MIDI RPN (Registered Parameter
Number) “Pitch Bend Sensitivity” messages (Control Change
messages No. 100, No. 101, No. 6, and No. 38).
If you are using an external MIDI sound module which
cannot recognize such messages, manually change Bend
Range on the external device to the same value on the GI-20.
Refer to the Owner’s Manuals for the external sound module
for information about its MIDI specifications.
* If the transmission mode is set to POLY, the MIDI messages
transmitted when two or more strings are played
simultaneously use semitone steps, which disallows string
bending, slide, and certain other techniques. For more on the
transmission mode settings, refer to “Setting the Transmission
Mode” (p. 14).
* When Glide or Pitch Bend is selected as the foot switch or
expression pedal Assign (p. 19) setting, and the BEND
RANGE setting is within the range of the Glide or Pitch Bend
range, the Glide or Pitch Bend will cut out and be retriggered.
-36 (-3 octaves)
24 (+2 octaves)