Yamaha GX-1 Manual page 19

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,EXP.
DYNAMIC RANGE COMPRESSOR
These
5
button
switches
fix
the
volume
range
that
can
be modified
by
means
of
the
Expression
Pedal,
within
a given range.
For example, even
if
the
Expression Pedal
is
in
the
OFF
position
when
switch
U
is
pushed
in,
volume
can be
preserved
up
to
a certain
degree.
When
the
Expression
Pedal
is
at
max, volume
change
is
practically
nil.
At
mini,
volume
is
preserved
up
to the usual
middle
point
2
of
the pedal.
OVERTONE
PRESET
BUTTON
In
order
to
accomplish
the
musical
intention,
even
in
the
midst of
playing,
buttons
1,
2,
3
and
4,
which were
preset
with
the selected overtones,
can
be interchanged
at
will.
Also,
connected
to the
inner part
of button
4
is
a
pitch
which
resembles
a
full
organ.
Switch
C
cancels the
preset.
PRESET
BOARD
The
GX-l's
preset
does not
indicate
tone
lever preset.
Rather,
it is
3
kinds
of combinations of
overtones
in
the
Upper
and
Lower
Manuals and
in
the
Pedal Board.
This preset
is
activated
by
means
of
the
5
buttons located
between
the
Upper and
the
Lower
Manuals.
OVERTONE
The
overtone of
the Preset
Board
corresponds
to
overtone.
TUNING
:
The
GX-l's
Upper
and
Lower
Manuals,
as
well
as
the
Pedal Board,
can
all
be tuned,
and
its
pitch
can
easily
be adjusted
for
ensembles with
other
musical instruments. Pitch
rises
when
the various
levers are
pulled
toward
the player.
Pitch
changes cover
a range
of
200
cents
(1
whole
tone).
WAVE
MOTION:
By
changing
pitch
in
row
II
and
mixing
in
row
I,
the
sound of
the
Upper
and
Lower
Manuals
as
well as the
Pedal
Board produce
a
more
robust
impression.
Raise
the
pitch
by
pulling the lever
toward
the player.
There
are
two
tone generators
in
row
II
of
the
pedal sounds.
By
controlling
P
IF,
a
wave motion
is
obtained only
in
row
II.
This
is
why
there
is
a
P
II
and P
IP only
for the Pedal.
16

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