Speed - Yamaha CS-50 Instruction Manual

[121
RING
MODULATOR
SECTION-
Ring modula-
tion creates
new
frequencies,
both higher and lower
in
pitch
than
the
note
played,
but does not allow
the
actual
note
to
be
heard. This
is
accomplished
by
"beating"
a
sub
oscillator
against whatever input
signal
is
fed to the
Ring Modulator,
thus producing
sum and
difference frequencies (the input frequency plus the
sub
oscillator
frequency and the input frequency minus
the sub oscillator
frequency).
The
input signal
is
then
cancelled
in
the output, leaving only the
sum
and
difference
of
the input and sub
oscillator
frequencies.
A
knowledge
of
how
the Ring Modulator works
is
not necessary to understand
how
it
sounds.
When
the
Ring
Modulator's sub
oscillator
is
set
to a
slow
SPEED,
the eflect
is
pulsing that
may
resemble
a
tremolo.
How-
ever, at faster speeds a
strange gong-like ringing or
non-
musical dissonance
will be
heard.
The
MODULATION
(amount
of
effect)
is
constant when
a note
is
played,
and
so
is
the
SPEED
unless
the adjacent
ATTACK
TIME,
DECAY
TIME
and
DEPTH
levers are activated;
these levers enable
you
to automatically speed
up and
slow
down
the
Ring
Modulator's sub oscillator
when-
ever
you
play
a
note,
for a
"swooping"
or "pinging"
effect.
A.
MODULATION LEVER
(gray) Adjusts the
depth
of effect
from no
effect (up!
to
maximum
effect (down).
B.
SPEED
LEVER
(white) Sets the modulation
speed or
rate.
Slowest speed
is
obtained with the
lever up,
fastest
with the
lever
down.
C.
ATTACK & DECAY
TIME
LEVERS
(black)
ATTACK
sets the
maximum SPEED
obtained
as
the ring
modulator moves from
the basic
SPEED
setting.
DECAY
sets
the length
of
time
it
takes
for the rate
to the
set
SPEED.
NOTE:
So
long as
you hold
down
one or
more
keys,
playing additional notes
will
not generate another Ring
Modulator
attack.
However,
if
you
let
go of
all
keys
first,
then the Ring Modulator
will
again attack
and
decay on
the
next note
or
chord
you
play.
D.
DEPTH
(grey)
Sets the
amount
of
automatic
speed change created
by
the
ATTACK
&
DECAY
levers.
(Depth does not
refer
to the
amount
of
Ring Modulation.) With
this lever
up
(minimum
depth), the
ATTACK & DECAY
TIME
levers
do
nothing.
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'a
note
is
played and
held down.
,
Depth alone has no
effect
on
speed.
Slow
attack slowly increases speed
up
to
maximum
and then
fast
decay drops the speed
quickly.
Fast attack
starts
modulation
at
maximum
speed and slow decay
causes gradual
drop
in
speed.
Slow
attack
and decay
cause
gradual
rise
and
fall
in
modulation speed
Minimum
depth prevents attack
and decay from
changing the
modulation
speed.
15
HOW
THE RING
MODULATOR WORKS
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