Yamaha CS-10 Owner's Manual page 8

FUNCTIONS
VCO/LFO
d)
TUNE
(Interval)
This control functions to
adjust
intervals.
When
turned
clockwise, the pitch
will
increase,
and
when
turned counterclockwise,
the
pitch
will
decrease.
This control
is
employed
when
tuning
the synthe-
sizer
to other musical instruments.
•
Tuning
is
to be
carried
out
after
about 30 minutes
have past
when
the
interval
have
stabilized,
following switch-on
of power.
©FEET
(Feet change
switch)
This instrument covers 3 octaves by
its
37
keys.
And, by
the use
of
this
FEET
switch, the
sound
range
that
is
covered
may
be
shifted
as
shown
in
the
drawing.
®
PW/PWM(
pulse
width/pulse
width modulation
)
PW:
Pulse
width
With
the
changeover
switch
set
to
PW,
turn con-
trol.
This
will
cause the pulse
width
to
change, thereby,
causing the harmonic
structure to
change
as well.
Thus,
it
can be used
as a
sound
source
that differs
from one
f
symmetric square waves
.
PWM
:
Pulse
width modulation
When
the control
is
turned, with the changeover
switch
set
to
PWM,
it
will
cause the pulse
width
to
be modulated with
the period
set
by
the
SPEED
control of
LFO.
@
LFO
MOD
This
modulates
the oscillation
frequency of
VCO
with the period
of
LFO,
to render an
effect
resembl-
ing "vibrato".
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PW:
Pulse width
At
maximum
change
-50%-
90%-
Pulse width:
90%
PWM:
Pulse
width modulation
At
maximum
change
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It
changes
in
the order of
LFO:
LFO
The
LFO
is
a
low
frequency
oscillator block
that
functions to
give
a periodic vibration to
intervals,
tone
and volume
with
regard
to the
VCO, VCF
and
VGA
blocks.
®
SPEED
This
is
a control
for adjusting the
oscillation
frequency. The
variable range
is
from
0.1 to
100
Hz. The
frequency becomes
higher, the
farther the
control
is
turned clockwise.
By
varying the speed,
it is
possible to produce
effects
of
different sen-
sations.
(2)
'X./
rv CHAMGE
SWITCH
By
changing
the
wave
forms of
LFO,
different
effects can be produced.
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