Technical data

ManualsBrandsMultimoog ManualsMusical InstrumentsMusical Instrument

EXERCISE

6:

LISTENING

TO

THE

NOISE

SECTION

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1.

Hold

down

the

highest

key

on

the

keyboard.

You

are

listening

to

pink

noise.

2.

Note

that

the LEVEL

control

of

the

NOISE

section

must

be

turned

up

(toward

"10")

in

order

to

hear

noise.

3.

Since

we

want

to

hear

the

NOISE

section

as

the

sole

sound

source,

the

sound

of

the

oscillators

must

be

removed

by

placing

the

OSCILLATORS

switch

to

OFF.

Also,

since

the

FILTER

is

not

desired

as

a

sound

source,

the

FILTER

MODE

switch

must

not

be

in

the

TONE-position.

(END

EXERCISE)

Noise

is

often

filtered

and

shaped

to

suggest

the

sounds

of

wind,

surf,

jets,

cymbals

and

other

percussion

instruments.

MODIFIERS

A

modifier

is

an

electronic

device

that

processes

or

alters a

signal.

The

Multimoog's

modifiers

alter

audio

signals

coming

from

the

sound

sources,

changing

the

sound.

A

modifier

has

both

an

input

and

an

output

since

the

signal

to

be

modified

must

flow

through

it.

A

simple

tone

control

on

a

stereo

set,

a

phaser,

wah-wah

pedal,

are

modifiers

of

sound

since

they

changethenatureofthe

audio

signal

that

passes

through

them.

The

Multimoog

has

two

modifiers,

a

voltage

controlled

amplifier

(VCA)

that

is

not

depicted

on

the

front

panel;

and

a

voltage

controlled

filter

(VCF)

as

represented

by

the

FILTER

section.

VCA

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VCA,

OR

VOLTAGE

CONTROLLED

AMPLIFIER

The

voltage

controlled

amplifier

'of

the

Multimoog

is

responsible

for

articulating

sound

by

modifying

its

loudness.

The

VCA

itself

is

not

depicted

on

the

front

panel;

its

associated

LOUDNESS

CONTOUR

section

provides

a

control

voltage

that

opens

and

closes

the

VCA,

creating

articulations

of

sound.

The

VCA

may

be

held

completely

open

(maximum

gain,

or

loudness)

by

placing

the

BYPASS

slide

switch

to

ON.

When

BYPASS

is

OFF,

the

LOUDNESS

CONTOUR

is

connected

to

the

control

input

of

the

voltage

controlled

amplifier

and

is

used

as

a

controller

to

open

and

close

the

VCA.

This

allows

control

over

rise

time

(attack),

or

the

beginning

of

a

sound;

and

fall

time

(release),

or

the

final

portion

of

a

sound.

The

following

Exercise

illustrates:

35