Yamaha CS-80 - Specifications

A
fixed
component
of
the
same value
was
then
built
45
into
the
instrument,
creating
a kind
of internal
memory
that is
recalled
whenever
the
corresponding
preset
patch
is
selected. You
can
always
duplicate
a preset
patch
by using
the
programmable
panels,
as is
suggested
by
some
of the
patch
charts
included
in
this
manual.
You
may wish
to do so,
and
to
then
vary
one
or
more
controls
to obtain
variations
from
the
presets.
Foot
Switch
& Foot
Controller
The
Foot
Switch is
just that—an ON-OFF
switch
which
is
housed
in an assembly
designed
for foot
actuation. The
switch
can
be used
to
activate the
portamento/glissando
effect
and/or
the sustain,
depending
on
the
setting
of front-panel
assignment
switches.
When
the
Foot Switch
is
not plugged
into
the
synthesizer,
the
jack
automatically
closes the
circuit
so the
unit
acts
as though the
Foot Switch
were pressed
down.
The
Foot
Controller
contains
more
complex
circuitry,
including
a
light
and a
photosensor.
As the
pedal is
rocked
back
and
forth,
an aperture
varies
the
amount
of
light
reaching
the
photosensor. In
turn, the
sensor
varies
its
resistance,
and
hence varies
the voltage
output
from
the circuit.
Depending
on
the
setting
of
the
front
panel FOOT
PEDAL
SELECTOR
buttons,
the voltage
from
the Foot
Controller
is applied
to
either
the
VGA
(in
EXP
mode)
or
to
the
VCA and
the VCF
(in EXP/WAH
mode).
The
Foot Switch
has
a
standard
(tip/sleeve) phone
plug,
whereas
the
Foot
Controller,
because it
contains
more
circuitry,
requires
a stereo
(tip/ring/sleeve)
phone
plug.
Tremolo/Chorus
The
tremolo/chorus
effect
varies the volume
of the
output signal,
and also
introduces
a phase shift.
Together,
these effects
simulate
a
rotating
speaker
when
used with
a
stereo sound
system. The volume
change
is produced
by feeding
a
sub
oscillator
output
to a pair of VCA's.
Selecting
the
CHORUS effect
sets
a sub
oscillator
to its very
slow
speed
range (about
1/2 to
5Hz),
whereas
TREMOLO
sets the
same
sub
oscillator
to a
faster
speed
range
(about 5
to
20Hz);
the exact
speed is
set with
the
SPEED
control. The
phase
shift
is
produced
by using an
analog delay line,
changing
the delay
in
a
regular
fashion with
a
clocking
circuit,
and mixing
delayed
and
non-delayed
audio
together. The
amount
of tremolo
or
chorus
effect
is
set with
the
DEPTH
control.