Yamaha GEP50 - Manual (Page 22)

47. Pitch A
This program can actually change the pitch of an input signal
over a ±1-octave range. The shifted pitch can be combined
with the direct sound (by an appropriate setting of the BAL­
ANCE parameter) to create automatic harmonies.
Pitch Shift (PiTCH): -12 —+12
Sets the degree of pitch change in semitone steps. +12 cor­
responds to an output pitch one octave higher than the input
pitch, and -12 produces an output pitch one octave lower
than the input pitch. An external MIDI keyboard can even be
used to select the desired degree of pitch shift.
Fine Tuning (FINE): -100
—
+100
Permits extremely fine pitch adjustment in one-cent steps.
Deiay Time (DELAY): 0.1
—
400 miiiiseconds
Sets the delay between the direct sound (input signal) and
the pitch-shifted output signal.
Feedback Gain (F.B. GAiN): 0
—
99%
When this parameter is set to 0, only a single pitch-shifted
sound is produced after the DELAY time has elapsed. As the
value of this parameter is increased, however, more and
more delayed repeats are produced, each pitch-shifted up
or down from the previous repeat according to the setting of
the PITCH parameter.
Base Key (BASE KEY): OFF, Cl — C6
This parameter sets the "BASE KEY” for an external MIDI
synthesizer used to control the PITCH parameter (the MIDI
OUT terminal of the synthesizer must be connected to the
GEP50 MIDI IN terminal, and the GEP50 must be set to
receive on the MIDI channel on which the synthesizer is
transmitting). If, for example, the BASE KEY parameter is
set to C4, pressing the C3 key on the synthesizer (C3 is
one octave lower than C4) will set the pitch change value to
-12. Pressing D4 on the keyboard would produce a pitch
increase of one whole-tone (+2). If a key more than an
octave higher or lower than the BASE KEY is pressed, the
resultant pitch change setting will still be within the -12 to
+12 range, as shown in the illustration below. If the BASE
KEY parameter is set OFF, pitch cannot be controlled via
the MIDI IN terminal.
+ 3
+ 1
t 10 I
+ 8
+ 6
+ 3
+ I
- 2
- 4
- 6
- 9
- 1 1
- 2
E 5
D 5
C 5
B 4
A 4
G 4
E 4
D 4
C 4
B 3
A 3
G 3
F 3
E 3
D 3
C 3
B 2
A 2
PITCH
f 5
t 4
t 2 -
t 12 -
t I I
f 9
^ 7
-I- 5
+ 4
F 2
0
I
- 3
5
• 7
- 8
- 10
■
12
—
- 3
H-1 — 1 - 1 2 range is
repeated
Pitch can be changed
over a ± 12 range with
the BASE KEY in
the center.
- 1 -— 12 range is
repeated
23 GEP50 GUITAR EFFECT PROCESSOR