SequentialSystems PRO-ONE 100 Operation Manual

MODEL 100

S/N 1 and up

PRO-ONE

SYNTHESIZER

OPERATION MANUAL

by

Stanley

Jungleib

Sequential

3051

North

San

Jose,

Circuits,

1st

Inc.

Street

CA 95134

[phone]

The

Pro-One

sources

are

is a

monophonic

two

voltage-controlled
OSC B. OSC A, OSC B,
low-pass
four-stage
stage
amplitude
provides
generates

In

addition
Three
OSC
routed
OSC A
filter

filter

(VCF).

envelope

is followed by a

also

under

frequency

control

a GA TE which

to

this

basic

modulation

B,

and a separate

for

either

frequency

frequency

sources

DIRECT

(FREQ), OSC A

(FILTER).

generator.

control

About

the

(one-voice)

oscillators

and a white

The

filter

modifies

The

filter

noise

voltage-controlled

of a

voltage

controls

voice,

are

available:

four-stage
(K

the

envelope

the

Pro-One

YBD CV)

low-frequency

or

WHEEL-controlled

pulse-width

Pro-One

keyboard

(VCOs),

source

the

voice

may

also

amplifier

envelope

generators.

has

the

filter

oscillator

(PW), OSC B

synthesizer.

referred

can

be

timbre

serve

(VCA), which

for

the

oscillators

extensive

envelope

(LFO).

modulation

Its

to

mixed

into

under

as

a sound

shapes

generator.

modulation

generator

Each

of

can

five

FREQ,

principal

sound

as OSC A

the

resonant

control

of

source.

the

The

,keyboard

and

filter,

prov1s10ns.

(FIL T ENV),

be

mixed

destinations:

OSC B PW,

and

its

This

voice

and

and
and

complement

This
interconnection

and

Prophet-10

to

five

or
which
preset
knobs
a

program

and

single

nor

switches

Prophet

Possessing
the

Pro-One's

cost

synthesizer; a 40-note
single­input
ing of
can
interest

external

This

or

with

low-level

drive a monophonic

to

microcomputer.

manual

polyphonic

ten

notes

all

programmable:

the

Prophet's

own

multiple-

preamplifier

computer

contains

instrument.

of

analog

have

the

been

at

one

control

you

on

the

control

voice,

so

it

sound

microcomputer

triggering,

and

inputs

such

or

enthusiasts,

all

the

synthesizer
well-proven

modules and

in

synthesizers.

time,

is

these

settings

always

panel.

capable

and

all

comprising

"patch"

But

of

standard

makes

sequencer,

and

the

unique

automatic

GA TE

as a microphone

stereo

amplifier,

the

Pro-One

information

the

the

Pro-One's

Besides allowing

two

instruments

a sound.

the

precise

the

Pro-One

as

much

range

and

monophonic

possible

an

innovations

arpeggiator,

automatic

generator

you'll

or

electric

or

readily

need

allows

stereo

interfaces

to

fully

routings

ancestors,

the

synthesist

contain

The

Pro-One

sound you

voice

itself

expression.

synthesizer

unheard

keyboard

glide

synthesizer

guitar.

headphones.

enjoy

provided

the

for

Prophet-5

to

play up

microcomputers

is

neither

want

with

is

identical

features,

of on a

modes

feature.

such

Arr

process-

The
for

this

audio

control

output

Of

special

outstanding

their

the

to

low-

as

audio

by

an

-

CMlOO

2/81

3

Table

of

Contents

About

SECTION 1 BASIC OPERATION

1-0
1-1
1-2
1-3
1-4
1-5
1-6
1-7

SECTION 2 FRONT PANEL

2-0
2-1
2-2
2-3
2-4

2-5

2-6
2-7
2-8

the

Pro-One

INTRODUCTION
CONNECTIONS
PLAYING

KEYBOARD

MODE

ARPEGGIATE
SEQUENCER
IN

CASE

INTRODUCTION

THE

VOICE
OSCILLATOR
OSCILLATOR
GLIDE
MIXER
FILTER
AMPLIFIER
MODULATION

CONTROLS

OF

DIFFICULTY

A
B

3

6
6
8

9

10
10

11

12

13
13
15
16
17
17

18
20
20

SECTION 3 BACK PANEL

3-0
3-1
3-2
3-3
3-4
3-5
3-6

4

INTRODUCTION
AUDIO
FILTER
GATE

CV

GATE/CLK

CVIN

OUT

OUT

IN

CV

IN

IN

CMlOO

23
23
23

24
24
24
24

2/81

1

SECTION 4

4-0
4-1
4-2
4-3
4-4

SECTION 5

5-0
5-1
5-2
5-3

5-4

5-5
5-6
5-7

SECTION 6

SECTION 7 FACTORY PATCHES

ROUTINE MAINTENANCE

INTRODUCTION
CLEANING
USER TRIM
OPENING
FUSE

SERVICE

INTRODUCTION
REMOVING

DAC

SCALE

TUNING

AMPLIFIER

KEY

CONTACTS

DIGIT AL

AUTHORIZED

SELECTED BIBLIOGRAPHY

PCB

BALANCE

INTERFACE

SERVICE

CENTERS

25
25
25

28
28

29
29
29
30
33
33
34

35

SECTION 8 PANEL BLANKS

CMlOO

2/81

y'

5

SECTION 1

BASIC

1-0 INTRODUCTION

This
unpacking,
learn
factory-provided
on

(paragraphs

The
of
you

references
sources
advised
this

Remember

much
wheels,
transport
"flight"

by your

OPERATION

section

how

the

keyboard

Pro-One

pitch,

can

timbre,
about

listed.

that

purpose

care

knobs,

the
case
music

contains

read

paragraph

to

use

patch

1-3

through

synthesizer

and

it

can

be

Thus

the

best

are

provided

the

Pro-One

as

you would

and

Pro-One

for

it.

dealer.

the

modes,

loudness.

with

obtained

prepared,

patches

can

These

If

instructions

1-1

and

Pro-One,

diagrams

triggering,

1-6).

offers

To

this

manual

from

you will

tend

at

the

back

is a

sophisticated

give a violin.

loosen

socketed

regularly,

are

made.by

you

can't

for

Pro-One

connect

read

(Section

the

also

paragraph

7).

the

arpeggiator,

extraordinary

exploit

the

to

these

and

the

more

extensive

no

doubt
disappear
of

this

instrument.

Shock

integrated

we

recommend

several

find a case,

set-up

instrument

1-2. This

Additional

capabilities

capabilities

books

listed

bibliographies

create

if

not

documented.

manual.

or

vibration

circuits

that

manufacturers

please

contact

and

basic

as

described.

performance

and

the

for

fully,

in

Section

many

It

interesting

should

can

damage

(ICs).

you

invest

and

our

operation.

To

explains

use

information

sequencer

spontaneous

learn

as

6.

Additional

contained

sounds.

Panel

be

handled

If

in a

should

Sales

blanks

the

keyboard,

you

expect

professional

be

Department.

After

quickly

of

the

follows

control

much

in

the

with

carried

as

Be

for

as
to

1-1 CONNECTIONS

The

l

l

l

\

Pro-One
power
115V,
Check

source.
and

instrument

switch

directions,

As

with

plug

to

directly

interconnections
to

prevent

and

clubs
use

one

AC

connections.

6

those

this

switch

in.

the

line

see

most

insure

to

the

potentially

are

of

the

has a switch

Pro-Ones

destined

and

Don't

change

voltage

paragraph

electronic
safe

grounding

metal

of

chassis.

the

lethal

notorious

several

for

"ground-checking"

on

its

back

shipped

for

Europe

set

to

this

switch

selector,

4-4.

equipment,

with

It

Pro-One

shocks.

their

in

the

match

you will

other

is up

and

poor

panel

U.S.

are

your

when

the

Pro-One

equipment.

to

all

other

As you

quality

devices

for

selecting

and

usually

line

the

have

you

instruments

probably

AC

to

Japan

switched

voltage

line

cord

to

change

comes

The

to

check

know,
wiring.
available

between

are

a 115-

usually

to

230V. WARNING:

before

is

connected.

the

plugging

fuse

or

switched

with a three-prong

ground

We

prong

the

power

and

equipment

many

therefore

on

the

is

and

older

urge

market

CM

230-Vac

to

the

If

you

do

also.

For

power

connected

ground

you

use

buildings

you

to

to

verify

100

2/81

Because

cable

hum

defeat

of

is

connected

may

occur.

the

the

hum

hum level will

hum, use

the
In

short,

hum

1.

2.

the

to

an

we

Plug

Plug

same

recommend

devices

electrician.

3. Verify all

AC ground, a "ground loop" will of

between

Defeating

but

this

depend

AC

outlet

acceptable

the

Pro-One

all

other

into

the

equipment

the

Pro-One

the

AC ground

practice

on how

the

for

can

two

the

level.

the

following

into a three-prong

equipment

same

outlet.

grounding

and

set

up a shock

units

Pro-One

steps

such as

Don't

with

its

with a two-prong
are

and

when

outlet.

amplifiers,

overload.

a ground

ten

be

amplifier.

hazard

connected

its

amplifier.

connecting

Don't

volume pedals, and

When in

tester.

created

As a

adapter

between

to

the

the

defeat

when

result,

the

low-level

will usually

the

units.

AC.

For

This should

Pro-One:

the

AC ground.

doubt,

consult

audio

The

minimal

reduce

effects

an

Sequential
incorrect
electrical

This is
converting

your sound
you like.
your

home

this

route

stereo

speakers

amplifiers
The

AUDIO OUT is a

plug.

For
plugs
amplifier,
and

two

TAPE

making

Stereo

Circuits,

AC power

shocks as a

an

excellent

the

synthesizer's

system

But

if your

stereo

be

careful.

source.

if

and

It

the

speakers

single-channel

at

both

ends should

you will probably

phono plugs

inputs.

these

(To
connections.)

headphones

headphones should

Inc. is

connections,

result

time

becomes

speakers

will

generally
The

can

generate

volume

specifically

standard

use

at

protect

can

have

a minimum

not

responsible

and

is

of poor grounding.

to

think

about

electrical

part

of

the

instrument.

are

muddy and

give you good

Pro-One

has

powerful

is

set

too

high.

designed

stereo

with

suffice.

phone

instrument

For

need a stereo

the

other.

speakers,

be

plugged

These

it

is

directly

impedance

for

not

liable

your

amplifier

output

to

weak,

high-frequency

much

more

transients

Therefore,

for

electronic

jack,

amplifiers,

playing

cable

through

with a stereo

will

connect

customary

into

of 600 Ohms.

any

equipment

for

any

the

potent

Of

course

so will

dynamic

which

you

but

it

to

switch

the

failure

personal

and

speaker

injury

vibrations

you

can

use

be

your sound. Using

range

can

range,

damage

might

but

than

consider

instruments.

accepts a stereo
a mono

both

cable

channels

phone plug

to

the

amplifier

off

the

amplifier

AUDIO OUT

due

due

system.

you

By

hear,

anything

if you go

the

typical

component

using

or mono

with

mono

of a

stereo

at

one

end~

AUX,

when

jack.

The

to
to

or

When power and audio
power on
Pro-One

For

CMlOO 2/81 7

other

with

may

back

back

not

panel

be

output

panel

switch,

operating,

connections,

connections

then

switch

see

paragraph

see

Section

have

amplifier

1-7.

3.

been

made,

first

power on.

switch

If

you

Pro-One

think

the

1-2

At
synthesizer,
ly.
envelope
reading
before
Set
the
the
knobs should be
though
shape
FREQUENCY knob(s) will

"beating."

PLAYING

this

point

Certain

sustain

Section

studying

the

Pro-One's

keyboard.

diagrams

some

is

switched

(after

the

knobs and

minimum

level

2.

But

it.

To do

controls

Patching

and

some

set.

may

have

off.)

unpacking)
conditions

need

if you

this,

is a

degree

For

completeness,

no

When

the

switches

such

to

be

established.

are

like

simply

as

closely

fine

art:

of

effect

oscillator

have

(for

to

Pro-One

on

the

control

as

mixer

most

people,

turn

to

as

possible

be

patient.

subjective

all

control

example,

intervals

be

tuned

is

probably

panel

volumes,

You

can

you'll

Section

to

Note

preference

positions

PULSE WIDTH when

are

by

ear,

not

have

filter

learn

want
8 and
the

that

select a factory

diagram

there

as

are

harmonically

usually

ready
to
cutoff

about

to

to

play. As a

be

set

purposeful-

frequency

the

controls

to

play

the

Pro-One

while playing on

is

inherent

exactly

diagrammed

for

where

the

pulse

related,

a minimum of

patch.

error

even

wave

and

by

in

the

the

PITCH

WHEEL

Figure 1-0

WHEELS

8

MOD

CO

WHEEL

and KEYBOARD

BO

Cl

Bl

C2

B2

CMlOO

C3

2/81

The

MOD

0.

The

"down"

modulation
position,
up or down by
module
through

The

these
amplifier

and

MOD

and

is

from

controls

dynamic

diagrams

are

set

or

PITCH

wheel

no

modulation

maximum.

which

about a fifth.

(e.g.

and

don't

as

required.

headphones.
VOLUME knob should
or

speakers,

pitch

over a four-semitone
instrument,
during
should

be

of

course).

such

as a piano.

performance.

centered.

wheels

sets

are

the

modulation

will

The

it

is

possible

An

GLIDE

timbral

indicate

variations.

VOLUME

VOLUME, of

For

be

set

as

MASTER TUNE

range.

If no

other

at

the

left

of

the

keyboard,

level.

occur.

PITCH

to

integral

and

When

wheel

simultaneously

part

FILTER ENVELOPE AMOUNT)

and

course,

optimum

high

as

possible

simultaneously

It

is used

Once

set,

instrument

When
the

is

not

wheel

normally

"bend"

of

playing

is using

MASTER TUNE knob

sets

the

signal-to-noise

(without

overdriving

adjusts

to

easily

tune

MASTER TUNE is

is in

use,

the

as

in

use

is

left

OSC A

shown in

the

advanced

in

its

and

the

Figure

wheel

fully

center-detent

OSC B

wheels

for

expression

settings

audio

output

ratio,

level

the

Pro-One's

your

the

not

OSC A

Pro-One

and

to

usually

MASTER TUNE knob

1-

is

left

"up,"

pitch

and

the

because

to

the

amplifier

OSC B

another

adjusted

Other

information,

methods

see

of

controlling

Section

the

3.

1-3 KEYBOARD CONTROLS

You

can't

play

chords

clarinet

playing
are
controls,
controls
devices

keyboard,

r

or

solo

played,

include

of

trumpet:

lines

and

with

which

great

these

LFO/CLOCK

tools

A

2

-8

·~·

\'9

1

0

FREQUENCY

B

10

-SHAPE--

on a Pro-One

they

on

the

when

you

you

the

arpeggiator

utility

aid

/\

B B

are

all

keyboard.

can

can

in

performance.

your

rL

Pro-One

for

monophonic

But

play

more

experiment

and

learning

SEQUENCER

SEQ 1

§OFF

SEQ 2

are

possible

the

same

instruments.

you

have

than

on

sequencer,

And by

how

to

patch.

ARPEGGIATE

RECORD

a

PLAY

reason
some

one

key.

almost

which

freeing

UP

§OFF

UP/DOWN

via

the

you

So you will

options

These

any

are

RE

B

NORMAL

back

can't

play

as

to

are

patch.

keyboard

both

hands

TRIG

REPEAT/EXT

NORMAL

panel.

chords

most

how
the

The

MODE

B

For

more

on a

often

the

be

keys
keyboard
keyboard

"memory"

from

ORONE

the

B GATE

OFF

Figure 1-1

KEYBOARD CONTROLS

CMlOO

2/81

9

To

understand

a

GA

TE signal is
generators.
to

proceed
DECAY periods
steady

control
GATE is
the

envelope

the

The

through

voltage

present.

generator

keyboard

produced

initial

set

When

RELEASE knob. (For

appearance

their

for

A TT ACK

each

(CV)

the

output

more

information,

controls

when

a key is

of

and

envelope

at

the

level

GA TE goes

voltage

you

first

the

DECAY
generator

set

off,

see

need

played,

GA TE

by

the

"triggers"

indicating

decays

paragraph

to

know

which

periods.

have

that

controls

the

envelope

After

elapsed,

inside

the

it

SUSTAIN knob for

the

key has

to

zero

at a rate

2-6.)

the

Pro-One

the

envelope

generators

A TT ACK

will

produce

as

long

been

released,

set

as

by

and

a

the
the

1-4

The
operation

audio
The

NORMAL
than
hear.
(initiating

MODE

MODE

input

module

in

the

GATE

various

generator.

NORMAL-RETRIG

one

means

note

low-note

at a time,

Furthermore,

new

envelopes)
mode) a GATE will
position on
words,

When
lope
this

switched

generators

switch
GATE is plugged
will be
(advance)

The

DRONE

their

SUSTAIN
hitting
frequency

the

the

last

also

gated

the

arpeggiator

switch

keys will

of

both

keyboard

key

played

up,

the

at a rate

enables

into

by

the

level.

not

oscillators

FILTER, (providing

contains

all keys

be

simply

a GATE

keyboard

(For

switch

priority

the

lowest

must

will be

produced

or of

will

be

indicator

modes.

more

selects

with

note

be

produced.

whenever

the

number

the

one

information,

single
completely

NORMAL-REPEAT

set

by

the

LFO/CLOCK

the

back-panel

this

jack,

the

LFO/CLOCK

external

or

DRONE

retrigger

GATE/CLK

sequencer

forces

the

overrides

the

(see below).

GATE on, holding

envelope

And

the

on

When

you

/EXT

GATE/CLK

REPEAT.

(providing OSC B KYBD is

the

KEYBOARD AMOUNT knob is

light-emitting

it

eases

see

envelope

generator

triggering.

the

keyboard

released

switched

a'

new key is

of

keys

simultaneously

hear.

switch

FREQUENCY knob.

IN

is

overridden

IN

input.

With REPEAT or DRONE

generators,

advanced).

diode (LED)

adjustment

paragraph

of

3-1.)

triggering

That

is, if you play

will

be

the

before

to

RETRIG

hit,

a new GA TE

regardless

held.

repeatedly

input.

gates

When

and

the

This signal will

the

envelope

but

switched

it

will

generators

up),

to

clarify

the

external

mode.

more

one

you will

(retriggering

of

its

In

other

the

enve-

Activating

an

external

envelopes

also

clock

at

on,

change

and

of

the
the

1-5 ARPEGGIATE

The

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keyboard.

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part
notes
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of

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remain

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the

paragraph

arpeggiator,

1-6 SEQUENCER

The

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sequencer

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5.

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SECTION 2

FRONT PANEL

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section

modulation.

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100 2/81

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SECTION 3

3-0

This
Except
digital

INTRODUCTION

section

describes

for

AUDIO

interface

oQ

)i:OUi:ntlAL

Figure 3-0

BACK PANEL

all

OUT,

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connections

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the

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the

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ier

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3-3

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the

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on

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be

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status

keyboard

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TE/CLK

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you

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range

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of

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the

24

CM

100 2/81

SECTION 4

ROUTINE MAINTENANCE

4-0

This

INTRODUCTION

section

covers

4-1 CLEANING

The

external
water.
the

4-2

This
front

Don't

paint

USER

paragraph

panel.
completed
instruments.
"zero-beat."

produce

"beats"
presented
per-second.
decreases
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harmonic

metal

use

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ruin

TRIM

describes

All

in

the

What

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at a rate

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As

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two

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all

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order

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pitch

they

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finish.

adjustment

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the

principle

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that

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the

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procedure

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This

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the

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frequency

your

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Hit

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Hit

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and
increasing
clockwise

OSC A FREQUENCY

(CW) a

OSC A SCALE

5.

Repeat

steps~

26

Figure

sets-up

adjust

again

small

trimmer

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1-0)

and

adjust

OSC B for

OSC A

adjust

use

FREQUENCY

OSC A FREQUENCY

amount.

counter-clockwise

until

both

OSC B FREQUENCY

as a reference.)

for

zero-beat.

to

attain

If OSC A

zero-beat,

FREQUENCY

(CCW) a

ends

of

the

keyboard

for

turn

small

tune

in

tune

zero-beat.

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needed

amount.

with

(zero-beat)

If

this
SCALE
decreasing,

zero

beats.

CM 100

with

required

trimmer

turn

2/81

6.

Switch

7.

Switch

8.

Hit

9.

Switch

10.

CO

Adjust

OSC A OCT

AVE
OSC B OCTAVE
and

adjust

OSC A OCT

-lV

TRIM

OSC A

AVE

for

to

0.

to 0 •...

FREQ

to

3.

zero-beat.

--

-1 V TRIM--

for

zero-beat.

11.

Switch

12.

Switch

13.

Switch
Hit

14.

15.

Hit
increasing
clockwise

OSC A OCT
OSC B
OSC B KYBD on.

CO

and

C3

and

OSC B FREQUENCY

(CW) a

OSC B SCALE

16.

Repeat

17. Adjust

18.

Switch

Adjust

19.

steps

OSC A FREQUENCY

OSC A OCTAVE

OSC B FREQUENCY

OCT A VE

adjust

again

small

trimmer

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and

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AVE

to

1.

to

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OSC B

adjust

FREQ

for

OSC B FREQUENCY

to

amount.

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until

both

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to

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to

3.
to

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SCALE-

zero-beat.

attain
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B FREQUENCY

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ends of

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for

zero-beat.

turn

small

keyboard

If

OSC B SCALE

needed

decreasing,

amount.

tune

with

zero

this

required
trimmer

turn

beats.

20.

21.

Switch
Hit

OSC B OCT

CO.

Trim

OSC A OFFSET

CMlOO 2/81

AVE

to

3.
for

zero-beat

•

.

,,,.

27

4-3

1.

Switch

OPENING

power

off.

2. Unplug power

3.

Remove
Remove

4.

5.

Carefully

it

up just enough

Reach

6.
underside of
connector

7. Also

cable

numbers

wooden
three

slide

in

so

the

disconnect

should

be

9-16

and

printed

stamped

8. Assembly is

4-4

The

paragraph

amp

FUSE

fuse

must

1-1). A

SLO-BLO

cord.

side

screws

top

to

allow

disconnect

side

keyboard

twisted

just

the

be

changed

1/4-amp

fuse

should

panels

along

panel

assembly

clearance

circuit

through

so

that

on

the

reverse

whenever

SLO-BLO

be

(2

screws

front

edge.

forward.

for

AC power

board

(PCB),

which you

cable

the

from

ribbon

connector

of

these

fuse

used

for

each

side).

When

your hand.

connector

at

right.

can

see

the

PCB. (When

crosses

will run along

steps.

the

line

voltage

should

230V

be

operation.

front

edge

running

(When

metal

contacts

reconnecting,

over

the

the

PCB

is

switched

used

for l 15V

is

clear

of

from

back

reconnecting,

is visible.)

the

board.

If

correct,

edge.)

(as

discussed

operation. A 1/8-

keys,

panel

lift

to

orient

keyboard

the

in

The

fuse

should be

discussed in
To

check
described
found

to

or

above.

the

checked

paragraph

change

Lift

right,

mounted

1-7).

the

the

when

fuse,

top

to

the

first

panel

clips on

Pro-One

unplug

assembly

the

PCB

does

the

power

off

and

underside.

not

cord

turn

appear

then

it

over.

to

open

The

be

working

the
fuse

(as

case•as

can

be

28

CMIOO

2/81

5-0 INTRODUCTION

The

information
technicians
may

have

with

the

understanding

owner

you void your

only.

critical

in

this

We

recognize

value

warranty

section

for

that

the

our

if

is provided

that

circumstances

player.

We

warranty

you

attempt

are

terms

these

for

reference

making

are

procedures

may

not

arise

these

affected.

by

qualified

in which

procedures

In

short,

on

the

Pro-One.

SECTION 5

SERVICE

service

this

data

available

as

an

5-1 REMOVING

1. Open

2.

3.

connector

4.

the

Pro-One

Pull

off

all knobs.

Disconnect

so

that

Remove 9 screws

PCB

wheel

the

as

directed

connector

side

in which you

holding PCB

transformer).

5.

The

PCB should now

LED is

6.
Switch
before

5-2

not

Set

the

stuck

PCB on

power on,

or

and

proceeding.

WARNING! LETHAL VOLTAGE

DAC

SCALE

lift

cemented.

insulation

allow

in

paragraph

at

away

ON THE

on

the

the

instrument

from

IS

left

q.n

see

to

top

the

bottom

PRESENT

PCB

UNDERSIDE

4-3.

of PCB. (When

the

panel

top

panel.

panel,

to

warm

IN

metal

(there

and

THE POWER SUPPLY AREA

contacts

are

If

not,

reconnect

up

for

reconnecting,

is visible.)

two

screws

check

at

that

AC

least

the

and

ten

orient

near

the

GA TE

keyboard.

minute;~

This

adjustment
readjustment
adjustment
voltmeter

1.

Connect

2.

Hit

absolute

3.

Hit

lV.

If

CM

100 2/81

(DVM)

CO

value

C 1 and

necessary,

may

is

made

DVM

and

of

note

should

is

to

note

this

adjust

not

be

only be

the

necessary

Pro-One

required.

back-panel

reading.

reading

reading,

which should be

Rll81

performed

if a

will

have

CV

OUT

jack.

The

reading

is

not

critical.)

DAC SCALE

as

part

repair

to

the

for

of

has

be

completely

will

be

value

the

,,~

the

tuning

been

approximately

read

in

exact

reading;

procedure.

made.

Whenever

In

retuned. A 3-1/2

0.083V. (The

step

2, plus

e.g.

exactly

l.083V.

fact,

this

digit

29

4.

Repeat

steps 2 and 3 as

OUT played by

CO

andCl.

required

to

establish

an

exact

l V

difference

between

CV

5-3

MODULATION

-FROM--TO-

. ' .

,~I

7

2 8 DUI

,/

\-

!ll

0

10

II.MOUNT ROUTE

FIL

ENV

'*\'

''

2

'"--

--8

1

~

\: 9 DIRECT

AMOUlllT

OSC

5

G

4

,'~·~'·

1

9

r\"

AMOUNT

LFO

Figure
TUNING

1.

2.

TUNING

,-----OSCILLATOR

WH~

WHEEL

Off

B

OSCAFREO

DIRECT

Wit[-----,

~

OFF

...

;------,----osc1LLATOR

WHm

WHl:l

a

OFF

~:C

ROUTE

B

Wt!~

...

DUI

W6"

WO:C~l!~W

DIAfCT

OFF

ROUTE

DIR

'

i-i

' I

~REQ

FILTER

0 "

'*'

.

:~'.

,-"'--.......9

_,

\'•

LFO/CLOCK

·~·

O

10

5-0

PATCH

Patch
Turn

according

Rl35

OSC A

/1

/\

~ ~

-SHAPE-

to

Figure

HI

A-----...

a-------

rL

~

--OSC A SCALE--

5-0.

For

SCALE fully

,.----

,*'

'.'

'

;::-•.

' \ .

o

10

ARPEGGIATE

..

~

...

component

counterclockwise

locations,

..

,.

NORMAL

(CCW).

,'~'.

2

2:

see

,'_~'.

,-~,9 ,-~~9

0

10

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-8

2

,

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,/

010 010 010 010

-8

,~\;',

1 \ 9 , \ 9 1 9 , \ ,

2

0

10

Figure

,'~'.

,~~9

0

10

0

ENVELOPE

AMOUNT AMOUNT

-8

2

\'9

, ;

~·

2 "-...

'*•'•,

,~\'',

O

10'

0 0 D

5-1.

,'~_',

1~9

10

0

10

KEYBOARD

·~'

-8

2 8

'-,

, \ ,

--==-·

2

'*•'•,

-8

10

0

,

.. \ ..........

,~···,

2' .:::::- •

' \ .

'

',

-·

,.

4

Hit

Cl

and

3.

4.

Hit

CO

5.

Hit

C3

OSC B
amount.

FREQUENCY,

adjust

and

adjust

and

adjust

If

OSC B FREQUENCY

counter-clockwise

6.

Repeat

7.

Switch
Switch

8.

9.

Hit

10.

11.

Hit
Repeat

steps!±

OSC A OCTAVE
OSC B OCTAVE

CO

and

adjust

C3.

Adjust

steps

OSC B FREQUENCY
OSC A FREQUENCY
OSC A FREQUENCY

turn

Rl28

(CCW) a

and.:?_

until

small

both

amount.

--OSC

to

2.

to

3.

OSC A FREQUENCY

R 135 OSC A

2.

and

.!_Q

until

HI

no

for

zero-beat.

for

zero-beat.

for

zero-beat.

OSC A SCALE

needed

ends

decreasing,

of

the

keyboard

A HI TRIM--

for

zero-beat.

TRIM

for

zero-beat.

improvement

trimmer

can

be

If

this

clockwise

turn

OSC B SCALE

tunes

with

made.

required

(CW a small

zero

beats.

increasin

trimmer

30

CM

100 2/81

()

~

-

0
0

N

-

00

-

\..>.)

-

'

....

'1!1!11111>,

~

""""'

Rl28

Rl35

Rl20

OSC A OSC

A

Rllll

Rll38

JlOl

OSC A OFFSET

SCALE

HI

TR

I H

-1 V TR

I

P1

VCA

BALANCE

Rl

40

Rl

48

Rl57

JUMPER

Ull3

Rll82

OSC B OSC B OSC

B '

COPTIONAU

8021

<OPTIONAL>

OFFSET

SCALE

HI

TR

IM

Figtre

5-1

PCB

--

-lV

TRIM--

Switch

12.

13.

Switch

14.

Hit

CO

15.

Switch
Adjust

16.

17.

Switch

18.

Switch

19.

Switch

20.

Hit

CO

21.

Hit

C3
increasing
trimmer

~'

turn

OSC A OCTAVE
OSC B OCTAVE
and

adjust

OSC A

Rllll

OCT

-lV

OSC A

TRIM

OSC A OCTAVE
OSC B OCTAVE

OSC B KYBD
and

adjust

and

OSC B

clockwise

OSC B

again

FREQUENCY

(CW) a

OSC B SCALE

to

to

AVE

to
for

to

to

on.

adjust

small

trimmer

0.

O.

FREQUENCY

3.
zero-beat.

--OSC B SCALE--

0.

O.

FREQUENCY

OSC B

FREQUENCY

to

attain

amount.

counter-clockwise

for

zero-beat.

for

zero-beat.

zero-beat,

If

OSC B

for

zero-beat.

turn

Rl48

FREQUENCY

(CCW) a

small

If

this

required

OSC B SCALE

needed

decreas-

amount.

22.

23.

24.

25.

26.

27.

28.

29.

Repeat

Switch

Switch

Hit
Hit
Repeat

Check

Switch

steps

OSC A OCTAVE

OSC B

CO

and

C3.

Adjust

steps

that

OSC A

30. Turn OSC A

31.

32.

Switch

Turn

OSC B OCTAVE

OSC B

20

and~

until

to

OCT

AVE

to

adjust

25

OSC B

R

157

and

OSC B

26

until

PITCH WHEEL

OCT

AVE

to

FREQUENCY

to

FREQUENCY

both

ends

--OSC

B HI TRIM--

3.

3.

FREQUENCY

HI

TRIM

no

--OSC

and

1.

to

0.

l.

to

O.

for

improvement

A/B

MASTER TUNE

of

the

keyboard

for

zero-beat.

zero-beats.

can

OFFSET--

be

are

tunes

made.

centered.

with

zero

beats.

33.

Switch

OSC B

sawtooth

32

off.

CM

100 2/81

34. Using
OFFSET

35.

Switch

36.

Switch

37.

Switch
Hit

38.

Cl

an

external

so

key

A2

pitch
OSC B
OSC A

sawtooth

OCT
OSC B OCTAVE
and

adjust

reference

is A-440.

back

AVE

to

to

3.

Rl40

OSC B OFFSET

(tuning

on.

3.

fork,

for

piano,

zero-beat

or

Prophet),

with

adjust

OSC A.

R 120 OSC A

5-4

•''

'*''WHEEL.Off

2

-8

S 8

1

o "

AMOUNT

FIL

ENU

,~·

o

',

2

:::8

1 0

\o

9

AMOUNT ROUTE

osc 8

5

6

4

7

3

~~

··~I\::

AMOUNT ROUTE DIR

LFO

Figure

AMPLIFIER BALANCE

----OSCILLATOAA----

w•~

DIR

OSCAFAEO

••••••

w•

~

ROUTE

OFF

...

OBCAPW

WHm

-~

8

OFF

DIRECT

::c

8

FAEG

" FREQUENCY

::~

DIR

Lj

WHEEL

OllC8PW

..

9

..

::~

LJ

FILTER

LFO/CLOCK SEQUENCER

4 5 6

7

3

~

',~,'

FREQUENCY

-------

5-2

AMPLIFIER BALANCE PATCH

1.

Patch

2.

Increase

minimum

according

system

envelope

to

volume

bleed-through.

Figure

SUI 1 AECOAO

~

...

5-2.

to

fairly

B

---

2

-8

1 9

10

D

'*•'',

AAPEGGIATE

..

~

...

high

level.

---

2.......... • 2

1-

9 , \ 9

0

10

'*•'•"'*•'•,

GLIDE

·~4

5&7

.

-·

' \ .

O

10

Adjust

0

AUTO

~

INNIMAL

-----FILTER-----..

:.~·.

-·

10

Rll38

~·.

,~. ,~.

0

10

,~···,

2

-82

1 9 1 9 1 • 1 •

10

----AMPLIFIER----

,~···,

2

-82

1 9

0

10 10

VCA BALANCE

:~·.

,~···, ·~···, ·~···,

·~···, ,~···, ·~···,

,.

,'~'. ,'~'.

1~'·

0

10

-82 -82

0

10

,.2

\ • , • 1 •

,~.

0

10

ENVELOPE

AMOUNT AMOUNT

D

D

0

KEYHJlltD

·10

0

•••

10

0

10

10

10

·~'

··.

•

.

-·

. \ .

. .

·~·.

',

.

-·

' ..

. "

for

5-5 KEY CONTACTS

After
panel

The
years
aggravated
wipe
use

the

for

cleaning

keyboard

of

reliable

the

contacts

any

abrasive

top

by

panel

uses

ambient

CMlOO 2/81

is

removed,

by simply

self-cleaning,

service.

conditions

carefully

techniques,

the

removing

gold-plated

Oxidation,

or

with

an

as

this

will simply

keyboard

four

screws.

particularly
handling.
alcohol-

can

be

contacts

of

If

this

occurs,

or

freon-wetted

remove

detached

which will

lesser-used

causing

the

gold

from

provide

keys,

cotton
plating.

the

bottom

may

"dead"

swab.

many

be

keys,

Don't

33

5-6 DIGIT AL INTERFACE

Use of

simple

your
an
please
For

1.

the

2.
circuit

3. Add

4.

the

hardware

system.

SCI

Authorized

note

parts

Remove

8021

Jumper

board

Rll82,

Table

terminated

Table 5-0

DIGIT AL INTERFACE PINS (J

PIN SIGNAL PIN SIGNAL

1
2 D4
3
4

5

6

digital

modifications

If

you

that

we

locations,

U 113 8021

removed,

pin 2 of

(PCB)

lOK-ohm,

5-0

lists

in a DIP

D5 7

D3
D2

Dl
DO

interface

doubt

your

Service

must

leave

see

Figure

microcomputer

the

Pro-One's

the

802l's

for

this

purpose.

l/4W,

pin

assignments.

plug.

8
9-14

for

to

technical

Center

all

5-1.

keyboard

socket

5%

external

the

Pro-One

ability

or

contact

questions

from

to

J 101-7.

resistor

Mate

101)

GATE

DAC EN
GROUND

computer

to

our

of

its

socket.

cannot

where

J 101

control

and

the

creation

install

the

Service

programming

Keep

operate.

Pads

are

provided

shown on

with

Figure

a

requires

of

software

interface,

Department.

your

system

it

safe.

Note

on

5-1.

14-wire

ribbon

both

please

However

to

that

the

printed

some

for

see

you.

with

cable

The

interface

than

0.8V
This allows
"keyboard"

by

the

positive-going

5. To

like

their
controls
One

somehow

number
Next
delay
point,
be
strobing

6. To
remove

8021.

play

the

following. (The

sequence.)

the

because

decides

in

DAC EN

of 20

GA TE

turned

the

return

Rl

34

is

compatible

and

a 1 by

the

numbers 0 through

control

notes

on

At

when

the

oscillators

the

envelope

what

binary

form

must

microseconds

can

go high,

off,

it

is

DAC.

the

Pro-One

182,

cut

greater

latched

DAC EN

the

Pro-One,

way

start,

and

key

on

be

forced

will

likewise

the

jumper

with

standard

than

2.5V.
63

to

the

pulse.

The

the

in

which

the

analog

filter)

is

unknown.

generators

(out of 63)

DO-D5. (This

high,

latching

allow

triggering

the

the

advisable

to

normal

installed

TTL

It

accepts

(decimal)

internal

GATE is

system

these

events

K YBD

are
it

wants

might

the

DAC

envelope

to

turn

operation,

in

step

logic,

to

convert

where

six

data

digital-to-analog

exercised

driving

it

will

happen

CV

output

Nothing

not

be

key

time

is now

being

to

done

gated.

play.

with a six-bit

data.

to

"settle"

generators.

the

GATE

unplug your

_l

and

carefully

a 0 is

bits

(DO

to

over

converter

via a bit

have

to

is

not

from

the

heard

First

It

then

For

practical

(worst-case).

When

off

(low)

system

signified

through

five

octaves'

at

pin 7.

do

something

so

important

DAC (which

from

the

the

sets

up

output

purposes

the

note

before

from

re-install

CMlOO 2/81

by

less

D5).

(DAC)

Pro-

system

the

key

port.)

At

this

is

again

JlOl,

U 113,

of

as

a

to

5-7 AUTHORIZED SERVICE CENTERS

SHUL TZ'S SOUND DESIGN
9542

Pollack

Huntington

964-5044

(714)

Beach,

CA

92646
[phone]
DA

YID

ABELL'S PIANOS

8162

Los

Beverly

Angleles,

Blvd.

CA

90048

[phone]

VALLEY SOUND

N.

La

1023

Los

Angeles,

Brea

CA

90038

[phone]

SPECIALIZED AUDIO SERVICES

2055

Piedmont

Atlanta,

(404)

873-1138

GA 30324

Rd.

MUSIC DEALER SERVICE

3210

N.

Pulaski

Chicago,

IL 60641

[phone]

RIVERA

Brighton

48

Allston,

(617)

MUSIC SERVICE

Ave.

1111

MA

02134

782-6554

TRIPLE S ELECTRONICS

NJ

St.

07109

322 Washington

Belleville,

[phone]

PI

CORP

13329

Cleveland,

(216)

TOLEDO MUSIC

3522 Upton Ave.

Toledo,

(419)

Pearl

Rd.

OH 44136

238-0644

OH

43613

475-9700

SERVICE

THE MUSICIAN'S BENCH

1733 S.E. Morrison

Portland,

OR

St.

97214

[phone]

AAA SWING

601

Illinois

Colinsville,

345-6700

(618)

CITY

at

Vandalia

IL 62284

IRC MUSIC

5911 E. 82nd

St.

Indianapolis, IN 46218

[phone]

PROTOTYPES

10449

Kensington,

Metropolitan

MD 20795

Ave.

[phone]

CMlOO

2/81

GUITAR CITY STUDIOS

470

N. 1100 West

Centerville,

l)

292-8461

(80

UT 84014

BOZOTRONICS
315 N.

Seattle,

(206)

36th

St.

WA

98103

633-3666

LONG & MCQUADE

459

W.

Bloor

Toronto,

St.

Ontario,

Canada

[phone]

35

SECTION

6

SELECTED BIBLIOGRAPHY

Appleton, John

Music

Prentice-Hall,

Backus, John

and Perara, Ronald

Englewood

The

Acoustical

York, NY.

Deutsch, Herbert
Ernst, David

Synthesis

The

Evolution of

Helmholtz, Hermann On
Strange, Allen
Wells, Thomas

Publishing,

Contemporary
Polyphony

Electronic

and

Manchaca,

Keyboard

Magazine,

Vogel, Eric

Box

Foundations

Alfred

Electronic

the

Sensations

Music William

TX.

Magazine,

20305,

The

Cliffs,

NJ.

Publishing,

of Tone Dover

C.

The

Technique

20605

Oklahoma

Development

of Music

W.W.

Sherman

Music

Schirmer,

Brown

of

Lazaneo,

City,

OK

Company,

Electronic

Cupertino,

and

Practice

Norton

Oaks,

CA.

New York, NY.

Publications,

Dubuque, IO.

Music

CA 95014

73156

of

Electronic

and

Company,

New York, NY.

Sterling

New

Swift

36

CM

100 2/81

This

section
imitations
controls

The
as

as

diagrams

starting
trumpet
heard
speed,

in a

your
acoustical
knob-set
CAY,
make

SUSTAIN, RELEASE),

music

contains

to

sound

diagrammed,

are

not

points

or

bass

musical

for

patch,

context

technique,

characteristics

parameters

with

the

20

patches

effects.

then

meant

you

to

for

example,

of

the

voicings of

of

such

as

Pro-One.

for

All sounds

fine-tuning

as

absolutes

create

because

rhythm,

the

room all

pulse-width

and

filter

It

takes

the

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