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Roland Polyphonic GR-300 - PRODUCING SOUND; USING THE VCF

Roland Polyphonic GR-300
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PRODUCING
SOUND
Set
the
controls
as
shown
on
the
left.
Set
the
external
amplifier
volume
at
minimum
and
turn
on
all
the
power
switches.
Turn
up
the
volume
control;
playing
the
guitar
should
produce
the
guitar
sound.
И
needed,
tune
the
Guitar
Con-
troller
in
exactly
the
same
way
as
an
ordinary
electric
guitar
is
tuned.
To
produce
the
synthesizer
sound,
turn
the
BALANCE
control
fully
clockwise
(to
''10'').
This
control
determines
the
balance
between
the
guitar
and
synthesizer
sounds.
For
the
moment,
leave
it
at
''10''.
The
sound
produced
now
is
the
unprocessed
sound
from
the
synthesizer
VCO's
(voltage
con-
trolled
oscillators).
Press
the
DUET
foot
switch.
The
DUET
switch
adds
the
fundamental
pitches
of
the
guitar
strings
to
the
VCO
sounds
to
produce
a
chorus
effect.
It
is
necessary
to
tune
the
VCO's
so
that
they
match
the
pitches
of
the
strings
by
using
the
MASTER
TUNING
control.
For
accurate
tuning,
use
as
hlgh
a
guitar
pitch
as
possible
and
allow
at
least
ten
minutes
for
a
warm-up
period
after
first
turning
on
the
power
switch.
USING
THE
VCF
Let's
try
the
VCF
(voltage
controlled
filter)
section
next.
While
producing
sound
as
des-
спрей
above,
try
slowly
lowering
the
Guitar
Controller
VCF
CUTOFF
FREQ
control
to
“0”.
Note
that
the
sound
becomes
softer
with
fewer
harmonics.
The
purpose
of
the
VCF
is
to
con-
trol
the
tone
color
of
the
synthesizer
sound.
Next,
raise
the
Guitar
Controller
RESONANCE
control
a
little
at
a
time
while
trying
different
positions
of
the
CUTOFF
FREQ
control.
This
produces
an
electronic
type
of
sound
usually
associated
with
synthesizers.
The
two
controls,
CUTOFF
FREQ
and
RESONANCE,
combine
to
control
the
tone
color
of
the
sound
passing
through
the
VCF.
Raise
the
VCF
SENS
(sensitivity)
contro!
to
maximum.
Set
the
RESONANCE
control
at
''5'"
and
the
CUTOFF
FREQ
control
at
"3".
While
repeatedly
picking
a
string,
try
pressing
the
ENV
MOD
(envelope
modulation)
foot
switch.
In
this
mode
of
operation,
the
filtering
action
of
the
VCF
is
controlled
by
the
picking
of
the
guitar
strings
instead
of
manually,
as
before,
to
produce
а
"мом"
sound.
This
is
called
envelope
modulation,
Try
raising
the
ATTACK
TIME
control.
This
causes
the
rising
(attack
time)
of
the
"мом"
sound
to
become
longer.
GUITAR
ТОМЕ
у
quran
вумтн
BALANCE
читок
кака
MASTER
TUNING
DUET
SWITCH
ADDS
TUNES
VCO'S
THE
FUNDAMENTAL
PITCHES
OF
THE
GUITAR
STRINGS
TO
VCO
a
CUTOFF
FREQ
RESONANCE
Af
a
foot
volume
pedal
(Roland
FV-20;
sold
separately)
is
connected
to
the
VCF
PEDAL
Jack
on
the
rear
panel
of
the
VCF,
the
VCF
cutoff
frequency
(in
other
words,
the
tone
color
of
the
output
sound)
can
be
controlled
manually
with
your
foot.

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