Roland Polyphonic GR-300 Owner's Manual page 8

PITCH SHIFT
Another
VCO
effect
is
pitch shift,
an effect
where the
VCO's can be shifted to pitches other
than the string pitches.
In
the
DUET mode,
the
fundamental pitches
will
be the
same
as
the
string pitches,
and the
VCO's can be turned
to
other pitches so that
one instrument produces
the effect of a very large
group.
Set the Guitar Synthesizer
and Controller for
the standard
settings
shown on page
4,
but with
the
BALANCE
control
fully
clockwise. Press
the
DUET
foot switch.
Next, press the
PITCH
"A"
foot switch
and note
that
the
LED
above
the switch
lights.
While producing sound, try
turning the
PITCH "A" knob up and
down and
note that this
now
controls the
VCO
pitches.
Try
tuning the
VCO's
to a
perfect fourth
below
the
fundamental
string pitch.
For
this,
the
PITCH "A" knob
will
be
set
somewhere
near
-3
Next, try Pitch
"B"
by pressing the
PITCH "B"
foot switch
and adjusting the
PITCH "B" knob
so as
to
produce
the interval
of
a
major
third
above
the fundamental.
At
this point,
"A"
tuning
is
a
perfect fourth
below the fundamental string pitch
and
"B"
tuning
is
a
major third above.
The
VCO
tuning
can
now
be switched instantly
and accurately
between these
two
preset pitches
and unison by
pressing
the appropriate
PITCH foot
switch.
Pressing
PITCH "A"
produces the
"A"
tuning;
pressing
it
again cancels the
"A"
tuning. Press-
ing
PITCH "B" produces the
"B"
tuning,
and
pressing again cancels
it. It is
possible to switch
from
"A"
to
"B"
or
from
"B"
to
"A" without
passing through unison
by merely pressing the
new
pitch
foot switch.
The
UNLATCH/LATCH
switch
below each
PITCH knob
controls the latching function
of
the related
PITCH
foot switch.
At
LATCH,
the
pitch
change function will alternate
between
the
ON
and
OFF
state
each time the foot switch
is
pressed as described in
the preceding
para-
graph.
At
UNLATCH,
the tuning function
will
be
ON
only while the foot switch
is
held
down
and
OFF when
it is
released.
It is
possible to
add
a
pitch sweep
(portamento)
to the pitch shift effect.
Set the controls
as
they
were
previously
("A" pitch
a
perfect fourth
below the
fundamental and
"B"
pitch
a
major
third
above), then set
both RISE
TIME and
FALL TIME
at
"5". While producing sound,
press
the
PITCH "A"
foot switch
and note that
the pitch slides
downwards from unison
to
the
"A"
tuning.
Next
press
the
PITCH "B"
foot
switch
and
the pitch will slide
from
the
"A"
tuning to the
"B"
tuning.
RISE
TIME
controls the
amount
of
time
re-
quired for the pitch
to change
when
it rises;
FALL TIME
controls
the
amount
of time
required
when
the pitch
falls.
Note that
this
effect
occurs only
when
using the pitch
shift
effect
and
is
not the
same
as
the
portamento
effect
which can be added to melodies played
on
a
keyboard type synthesizer.
When
"instant"
changes are desired,
the controls should be
left
at"0". Try this effect
with RISE
TIME
AT
"0"
and
FALL TIME
at
"10".
PITCH RISE
AND
FALL FINE
SET
2
CHANNEL SELECTS
UNLACH/LACH SELECTS A
or
PITCH SHIFT
mode FOOT SWITCH
B by
FOOT
SWITCH
If
a
foot switch
is
used with the rear panel
SWEEP
ON/OFF
jack,
the
ON/OFF
function of
the pitch sweep
can be controlled with
a
foot
switch.
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