Technical data
When
the
pedal
is
inserted
into
the
MODULATION
jack,
it
will
act
in
tandem
with
the
MOD
AMOUNT
wheel
to
control
the
amount
of
modulation.
When
the
MOD
AMOUNT
wheel
is
fully
forward
(toward
the
control
panel),
the
pedal
can
be
used
over
the
widest
span
of
modulation
effects.
If
the
MOD
AMOUNT
wheel
is
only
slightly
forward,
the
pedal
will
cover
a
restricted
span
of
modulation
effects.
Obviously,
if
the
MOD
AMOUNT
wheel
is
completely
back
(no
modulation),
then
the
pedal
will
have
a
span
of
"zero"
and
allow
no
modulation
effects.
Similarly,
you
could
set
the
pedal
and
play
the
wheel.
A
practical
musical
application
would
be
to
set
the
pedal
to
restrict
the span
of
the
MOD
AMOUNT
wheel,
so
vibrato
could
be
controlled
with
larger
movements
of
the
MOD
AMOUNT
wheel.
Larger
movements
are
easier
to
control-
for
subtlety
of
modulations.
In
the
previous
example
the
pot
in
the pedal
acts
as
a
variable
resistor
used
to
attenuate
(reduce)
the
sensitivity
of
the
MOD
AMOUNT
wheel
when
producing
vibrato.
A
fixed
resistor
could
be
used
instead,
as
shown:
FIXED
EXT.
MOD.
AMOUNT
ATTENUATOR
220K
RESISTOR
The
value
of
the
resistor
may
be
seleaed
to
suit
your
taste.
This
arrangement
could
be
made
so
that
it
could
be
switched
in
or
out:
SWITCHED
EXT.
MOD.
AMOUNT
ATTENUATOR
SHIELD
(NO
CONNECTION)
L
-0
ATTEN
,O
vVA-
«"
STEREO
PLUG
Now
let's
look
at
the
actual
control
signal
input/output
capabilities
of
the
MODULATION
jack.
First
let's
review the
output
rules:
(1)
The
output
signal
is
selected
by
the
SOURCE
selector;
(2)
This
signal
is
available
externally
at
the
tip
contact
of
the
stereo
MODULATION
jack;
(3)
The
level
of
the
output
signal
is
controlled
by
the
MOD
AMOUNT
wheel;
(4)
The
rate
(when
appropriate)
is
set
by
the
RATE
knob.
Now
let's
look
at
the
input
rules
for
the
MODULATION
jack:
(1)
The
input
signal
goes
directly
to
the
ROUTING
selector;
(2)
Therefore
its
level
is
not
O
FULL
220K
OR
SELECT
AS
DESIRED
SWITCH
affected
by
the
MOD
AMOUNT
wheel;
(3)
The
ring
is
the
appropriate
contact
for
feeding
signals
into
the
MODULATION
jack;
(4)
This
ring
input
can
be
fed
from
any
external
source
(Moog
911, 921,
another
Multimoog,
etc.).
The
diagram
below
indicates
wiring
procedure
that
allows
Multimoog
A
to
modulate
Multimoog
B.
Connection
is
made
between
respective
MODULA
TION
jacks
(Multimoog
A
shows
output
wiring;
Multimoog
B
shows
input
wiring):
SIMPLE
MODULATION
JACK
TO
MODULATION
JACK
CONNECTION
(MOD
OUT)
TIP
TIP
TIP
(MOD
OUT)
SWITCH
(MOD
IN)
MULTIMOOG
A
¥,»"
STEREO
PLUGS
In
the
example
above,
neither
Multimoog
will
modulate
itself,
because
the
self-feeding
switches
on
both
MODULATION
jacks
are
opened
when
a
plug
is
(MOD
IN)
MULTIMOOG
B
inserted.
If
you
want
Multimoog
A
to
modulate
itself—as
well
as
Multimoog
B—add
the
following
jumper
wire
to
the
previous
wiring
setup:
64