Roland Polyphonic GR-300 Owner's Manual page 7

VCO VIBRATO
Next,
let's
try different
ways
of
modulating
or
controlling the VCO's.
First
is
vibrato,
which
is
a slight
wavering of
pitch.
Vibrato can be
produced
in
the normal
guitar
way
by using the
finger to vary the tension
on the
string,
or
it
can be produced
electronically for a
wide
number
of effects.
Set the
VIB
DEPTH
(vibrato depth)
knob
on
the Guitar Controller
at
"10".
This
may
or
may
not produce the vibrato
effect.
If
not,
touch the metal upper end (Touch
Plate
1)
of
the
hummbucking
pickup
near the bridge of the
Guitar Controller to turn the vibrato effect
ON.
To
turn
it
OFF,
touch the opposite end (Touch
Plate 2) of the pickup.
The
vibrato
will
decay
after releasing the
touch
plate.
With the vibrato
ON,
try various positions of
both the
VIB
DEPTH
control on the Guitar
Controller and the
LFO RATE
(LFO = low
frequency
oscillator)
control on the Guitar
Synthesizer and note the
effects.
VIB
DEPTH
controls the depth
of
the
vibrato effect
and the
LFO RATE
controls the speed of the vibrato.
The
electronic vibrato affects only the
VCO's.
In
the
DUET
mode,
the
combination
of the
non-vibrato
fundamental
string pitches with the
vibrato
VCO
pitches produces the chorus effect
sound.
The Guitar
Controller Instruction
Manual
contains additional information
on
the vibrato
ON/OFF
function.
If
a foot switch
is
used with the rear panel
COMP
jack, the
ON/OFF
function of the
compression can be controlled with
a
foot
switch.
m *
TOUCH PLATE
2
Turns
VIBRATO
effect
OFF,
or for touch-Vibrato.
VIBRATO DEPTH
TOUCH PLATE
1
Turns the VIBRATO
effect on
CONTROLS THE
SPEED OF THE
VIBRATO