Multimoog Musical Instrument Manual de Serviço descarregar pdf (Página 24)

6.

Hold

the

lowest

key

on

the

keyboard.

7.

Step

the

OCTAVE

selector

through

all

of

its

positions

and

rotate

the

WIDE

FREQ

control

for

each

position.

Notice

that

the

WIDE FREQ

control

is

operable

only

when

the

OCTAVE

selector

is

in

the

rightmost

position.

8.

Return

the

OCTAVE

selector

to

the

8'

position.

Notice

that

the

intervening

movements

of

the

WIDE

FREQ

control

did

not

interfere

with

the

original

tuning.

9.

Hold

down

a

key

in

the

middle

of

the

keyboard.

10.

Move

the

DOUBLING

control

slowly

clockwise

toward

the

"+5"

position;

then

counterclock

wise

toward

"-5."

Note

that

the

pitch

sounded

by

OSCILLATOR

B

may

be

doubled

either

one

or

two

octaves

lower

than

the

primary

pitch,

as

indicated

by

panel

graphics.

11.

Return

the

DOUBLING

control

to

original

"0"

position.

12.

Rotate

the

MIX

control

to

the

A=B

position

to

hear

both

oscillators.

13.

Rotate

the

INTERVAL

control

of

OSCILLATOR

A

to

UNISON.

The

INTERVAL

control

tunes

OSCILLATOR

A

relative

to

OSCILLATOR

B.

Try

different

intervallic

tunings.

14.

Play

with

the

MASTER

A&B OCTAVE

and

WIDE

FREQ

controls

to

confirm

that

they

control

both

oscillators.

Return

OCTAVE

to

8'.

15.

Rotate

the

MIX

control

fully

clockwise

to

hear

OSCILLATOR

B

only.

Introduce

doubling

using

the

DOUBLING

control.

16.

Rotate

the

INTERVAL

control

on

OSC!

LLATOR

A

widely.

(Has

no

effect

on

the

tuning

of

OSCILLATOR

B

or

its

doubling.)

17.

Move

the

FINE

TUNE

control

on

the

rear

panel.

(Tunes

OSCILLATOR

B.)

18.

Turn

MIX

fully

counterclockwise

to

listen

to

OSCILLATOR

A.

Move

FINE

TUNE

control.

(Tunes

OSCILLATOR

A

also.)

(END

EXERCISE)

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The

controls

that

affect

the

pitch

of

both

oscillators

are

OCTAVE,

WIDE

FREQ,

and

FINE

TUNE

on

the

rear

panel.

INTERVAL

controls

the

pitch

of

OSCILLATOR

A

independently.

DOUBLING

relates

only

to

OSCILLATOR

B.

The

OCTAVE

selector

moves

both

oscillators

in

octave

increments

from

32

to

2/

(the

sign

(')

is

borrowed

pipe

organ

terminology

indicating

pipe

lengths,

hence

"foot.")

The

"C"

in

the

midctle

of

the

keyboard

is

footage reference.

The

rightmost

position

of

OCTAVE

activates

the

WIDE

FREQ

control.

The

WIDE

FREQ

controls

provides

a

means

of

tuning

continuously

over

approximately

eight

octaves.

When

activated,

the

WIDE

FREQ

control

may

be

used

to

transpose,

or

make

the

oscillators

sound

in

one

key

while

you

play

in

another

key

on

the

keyboard.

The

use

of

a

capo

with

an

acoustic

guitar

is

a

good

analogy.

(CAPO:

A

movable

bar

attached

to

the

fingerboard,

especially

of

a

guitar

to

uniformly

raise

the

pitch

of

all

the

strings.)

Generally,

it's

good

practice

to

avoid

using

the

FINE

TUNE

control

to

help

tune

WIDE

FREQ

transpositions,

because

the

other

OCTAVE

settings

will

be

affected,

and

hence

the

overall

tuning

of

the

instrument.

The

FINE

TUNE

control

on

the

rear

panel

is

the

overall

fine

tuning

control.

That

is,

it

tunes

both

oscillators,

regardless

of

their

intervallic

relationship.

For

instance,

if

the

oscillators

are

tuned

to

a

Perfect

Fifth,

they

willstay

in

that

interval,

but

will

be

tuned

up

or

down

by

the

FINE

TUNE

control.

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