Yamaha CS-50 Instruction Manual page 39

«
f»
VCO
(Voltage Controlled Oscillator)
|15]
SPEED —
Adjusts the rate of pulse width
modu-
lation of the
Square wave, provided the
PWM
lever
is
moved away
from
its
"0"
position.
[16]
PWM -
Adjusts the
depth
of Pulse Width Modu-
lation (the
deviation
in
square
wave
duty cycle).
A
"0"
setting yields
no modulation.
[
1 7]
PW
—
Sets the basic
duty cycle of the square
wave
from
a symmetrical
wave (50%)
to
a
narrow pulse
(90%).
[18]
SQUARE WAVE -
Turns
ON
the square wave
generating
circuits
when
the switch
is
rocked
forward.
[ 1
9]
SAWTOOTH WAVE -
Turns
ON
the
sawtooth
wave
generating
circuits
when
the switch
is
rocked
forward.
(20)
NOISE
-
Introduces white noise into the
VCO
output
as the slider
is
moved
up (-10
is
maximum
noise).
35
*«•
i
'•
a
50%
90X
50%
inj
-
ir-Ln_n_r
Slow Pulse Width Modulation
iiiiEDi
50%
90:. 50%
BOX
50%
~i_ru~r
n_n_ru
Fast Pulse Width Modulation
11
13 15
o
1 'i'i:
--
90%
Square
Wave
Pulse Width
. . i . .\ ,,
-
\i
5
7
9
11
13 15
9
1
3
£
lOMOitH H^-HakllMll
50%
Square
Wave
Pulse Width
4 5 6
7
8 9
10-11 12 13 14 15
*=±
ilHlBII
1
2 3
1
IH
.-I
Li
'
. •
"Li
--
\
-•
<i,i
Sawtooth
Wave
.»
*******
Noise
'NOTE: The
fundamental
(C)
is
the note played, and
the smaller notation to the right
suggest
the
harmonics
(overtones)
of
that note,
all of
which
are simultaneously
generated by
the
VCO.