Yamaha DX7 II FD Manuel utilisateur

YAMAHA

Voicing

Parameter

Reference

Guide

lru·FC>/D

DIGITAL PROGRAMMABLE ALGORITHM SYNTHESIZER

SUPPLEMENTAL

BOOKLET

Welcome-----------.,

This

the

first

series

booklets

designed

provide

practical

guide

creating

your

own

sounds

the

DX7

II.

describes

all

the

voice

and

performance

parameters,

the

range

their

values,

and

the

general

effect

each

one

has

the

final

sound.

The

parameters

are

not

presented

the

order

their

physical

layout

the

front

panel.

Instead,

they

are

presented

the

order

most

conducive

understanding

synthesis.

Section

provides

brief

introduction

synthesis

the

DX7

II.

Section

describes

the

basic

voice

parameters,

which

determine

the

actual

timbre

each

voice.

Section

describes

the

voice

effect

parameters,

which

determine

the

keyboard

and

controller

configuration

each

voice.

Section

describes

the

performance

parameters,

which

determine

such

things

the

combination

different

voices

and

the

microtuning

they

will

reflect

For

continuing

information

concerning

the

DX7

FD!D,

consult

AfterTouch,

the

official

publication

the

Yamaha

Users

Group.

Many

advanced

functions

will

discussed

its

pages

the

coming

months.

There

will

also

information

regarding

the

availability

other

materials

concerning

advanced

applications.

receive

free

copy

AfterTouch

every

month,

send

your

request

AfterTouch,

P.O.

Box

7938,

Northridge,

91327-7938.

your

letter

postcard,

sure

indicate

that

you

are

the

owner

DX7

FD/D.

Contents

Section

Introduction

Section

Basic

Voice

Parameters

Algorithm

Button

(#7)

Output

Level

Button

(#10)

Part

Oscillator

Button

(#8)

Button

(#9)

Pitch

Button

(#13)

LFO

Button

(#12)

Sensitivity

Button

(#11)

Output

Level

Button

(#10)

Part

Using

the

COPY

Button

Section

Voice

Effect

Parameters

About

Voice

Effect

Parameters

Key

Mode

Button

(#23)

Pitch

Bend

Portamento

Button

(#24)

BC!MW/AT

Button

(#25)

FC1/FC2

Button

(#26)

Section

Performance

Parameters

About

Performance

Parameters

Voice

Mode

Button

(#28)

Pan

Button

(#30)

FS/CS

Button

(#27)

Micro

Tune

Button

(#29)

Introduction

The

DX7

digital

synthesizer

capable

producing

almost

infinite

variety

sounds

using

technique

synthesis

known

(Frequency

Modulation).

- 1-

Introduction

The

process

ofFM

synthesis

involves

the

modulation

one

oscillator's

frequency

with

the

signal

from

another

oscillator.

the

DX7

II,

oscillators

are

known

operators.

Those

operators

which

actually

produce

audio

output

are

called

carriers.

Operators

which

modulate

the

frequency

other

operators

are

called

modulators.

The

overall

sound

which

results

from

combining

carriers

and

modulators

depends

many

factors,

including

the

specific

combination

operators.

Another

important

factor

the

output

level

each

carrier

(which

affects

the

volume

ofthe

sound)

and

each

modulator

(which

affects

the

timbre

the

sound).

The

DX7

incorporates

two

sound

modules,

each

consisting

six

operators.

The

operators

each

sound

module

can

combined

into

different

configurations

carriers

and

modulators.

These

configurations,

known

algorithms,

are

depicted

the

front

panel

the

DX7

II.

They

determine

which

operators

will

act

carriers

modulators,

well

their

specific

combination.

the

diagrams

shown

the

front

panel,

the

operators

the

lowest

row

are

carriers.

Those

appearing

above

the

carriers

are

modulators.

The

lines

connecting

the

operators

indicate

the

signal

paths.

The

parameters

described

the

following

pages

are

accessed

pressing

the

appropriate

button

the

front

panel.

Some

buttons

display

their

parameters

several

LCD

"screens"

which

are

selected

pressing

the

button

repeatedly

until

the

desired

screen

displayed.

The

parameter

edited

selected

positioning

the

cursor

with

the

cursor

keys.

The

parameter

value

changed

using

the

-11+

keys

the

data

entry

slider.

-2-

Basic

Voice

Parameters

The

basic

voice

parameters

are

used

shape

the

overall

character

ofa

voice.

They

are

adjusted

the

voice

edit

mode.

This

mode

entered

pressing

one

the

VOICE

MODE

SELECT

buttons

from

the

play

mode,

selecting

the

AorB

voice

with

the

AlB

key,

and

pressing

the

EDIT

button.

The

parameters

described

below

are

then

accessed

pressing

the

appropriate

button.

-3-

Algorithm

Button

(#7)

Algorithms

form

the

foundation

synthesis.

They

determine

which

operators

will

act

carriers

and

modulators,

the

specific

arrangement

operators,

and

the

feedback

path

(described

below).

The

following

diagram

represents

Algorithm

and

illustrates

the

various

parts

any

algorithm.

r···;~;~~~;-~-h~;-··1

[

___

~esdback

loop \

1st Stack 2nd Stack

1 modulator 3 modulators

The

Algorithm

button

(#7)

provides

access

the

following

parameters

single

LCD

display.

Alg

The

Alg

(algorithm)

parameter

selects

the

algorithm

used

voice.

Algorithm

Algorithms

determine

the

way

which

the

operators

are

combined

carriers

and

modulators.

This

has

fundamental

impact

the

types

sounds

each

algorithm

can

produce.

For

example,

algorithm

creates

good

flute

sounds,

and

algorithm

produces

very

good

organ

sounds.

Fbi

Each

the

algorithms

has

one

feedback

path.

The

output

one

operator

(usually

modulator)

directed

back

its

own

its

modulator's

input.

The

Fbi

(feedback

level)

parameter

adjusts

the

level

the

signal

returning

along

the

feedback

path.

feedback

Maximum

feedback

The

effect

this

self-modulation

not

unlike

that

modulation

another

operator.

often

applied

string

and

brass

sounds,

well

noise

sounds

with

high

level

settings.

-4-

Osc.sync

Transpose

Voice

name

Each

DX7

operator

produces

sine

wave.

The

Osc.sync

(oscillator

synchronization)

parameter

determines

whether

not

the

sine

waves

all

begin

phase

they

do,

the

timbre

voice

will

evolve

the

same

way

each

time

key

pressed.

off

not

start

operators'

sine waves

phase

for

each

keypress.

Start

operators'

sine

waves

phase

for

each

keypress.

The

following

diagram

illustrates

the

effect

this

parameter.

:::-·

......

etc. etc.

this

parameter

off,

the

tonal

transition

will

smoother

between

notes

played

legato

and

abrupt

between

notes

played

staccato.

This

often

effective

for

acoustic

instruments.

Normally,

the

pitch

the

DX7

keyboard

set

that

the

key

marked

with

the

small

triangle

corresponds

middle

(C3)

with

frequency

262

Hz.

The

transpose

parameter

allows

you

shift

the

pitch

this

key

(and

thus

the

entire

keyboard)

for

any

voice

half

steps

much

two

octaves

above

below

the

standard

pitch.

Assign

the

pitch

the

marked

key.

Assign

the

pitch

the

marked

key.

This

parameter

useful

for

adapting

the

keyboard

range

suit

the

voice.

For

example,

flute

piccolo

patch

would

well

served

transposing

the

keyboard

pitch

up.

bass

sound

would

need

downward

transposition.

This

parameter

lets

you

name

the

voice

you

are

editing

with

ten

symbols.

The

available

symbols

(letters,

numbers,

etc.)

are

printed

brown

below

the

Data

Entry,

Voice

Mode

Select,

Copy,

Performance,

and

number

buttons.

enter

name,

move

the

cursor

the

voice

name

parameter

and

hold

down

the

Edit

button,

which

has

the

word

"Character"

printed

below

it.

While

holding

the

Character

button,

enter

the

desired

symbols

pressing

the

respective

buttons.

Pressing

the

Internal

button

while

holding

the

Character

button

will

produce

lower

case

letters.

The

Cartridge

button

will

produce

upper

case

letters.

-5-

Output

Level

Button

(#10)

Part

The

Output

Level

button

(#10)

provides

access

various

level

and

scaling

parameters

two

LCD

displays.

For

the

moment,

only

the

level

parameter

itself

will

described.

The

other

parameters

control

the

level

scaling

the

voice,

and

will

described

later

this

section.

The

level

parameter

accessed

selecting

the

normal

scaling

mode

and

pressing

the

Output

Level

button

once.

Level

This

parameter

determines

the

output

level

(amplitude)

the

selected

operator.

Oscillator

Button

(#8)

Mode

Coarse/Fine

Operator's

output

level

(operator

oft).

Operator's

output

level

maximum.

This

parameter

fundamental

importance

synthesis.

The

output

level

carrier

influences

the

volume

the

overall

sound.

Remember

that

carriers

are

operators

which

actually

produce

audio

signal.

modulator's

output

level

influences

the

timbre

the

overall

sound.

the

output

level

modulator

increases,

the

number

and

strength

the

harmonics

the

sound.

The

Oscillator

button

(#8)

provides

access

the

following

parameters

single

LCD

display.

This

parameter

determines

whether

not

the

pitch

the

selected

operator

will

vary

different

keys

are

pressed.

Ratio

Specifies

that

the

selected

operator

will

vary

pitch

different

keys

are

pressed.

Fi xed

Specifies

that

the

pitch

the

selected

operator

will

remain

unchanged

regardless

the

keys

being

played.

The

ratio

mode

generally

used

carriers

produce

different

musical

notes

different

keys

are

played.

The

fixed

mode

useful

for

special

effects

sounds,

and

for

the

noise

component

found

many

acoustic

instrument

sounds-such

the

breath

flute

the

plucking

harpsichord

string.

The

frequency

(pitch)

produced

each

operator

controlled

primarily

the

coarse

and

fine

frequency

parameters.

The

coarse

parameter

adjusts

the

pitch

the

selected

operator

large

increments.

The

fine

parameter

performs

the

same

task

small

increments.

They

are

used

together

establish

pitch

for

the

selected

operator.

The

coarse

parameter's

maximum

value

less

than

the

highest

possible

total

frequency

value.

The

fine

parameter

used

increase

the

total

value

beyond

the

maximum

coarse

value.

-6-

tune

fixed

mode,

the

coarse

and

fine

parameters

specify

the

frequency

the

operator

Hertz

(Hz).

ratio

mode,

the

frequency

the

operator

depends

the

key

being

played.

The

coarse

and

fine

parameters

specify

the

interval

between

the

operator

and

the

standard

pitch

associated

with

each

key.

For

example,

setting

the

coarse

and

fine

parameters

value

2.00

ratio

mode

will

cause

the

operator

sound

one

octave

higher

than

the

standard

pitch

level

the

keyboard.

setting

0.50

causes

the

operator

sound

one

octave

lower

than

standard

pitch.

Fixed

mode

values

(in

Hz)

OOOHz

Lowest

fixed

mode

value.

1000

Highest

coarse

value

9772

Highest

fixed

mode

value.

Ratio

mode

values

Operator

sounds

one

octave

below

standard

pitch.

1.00

Operator

sounds

standard

pitch.

Operator

sounds

one

octave

above

standard

pitch.

31.00

Highest

coarse

value

(nearly

octaves

above

standard

pitch).

61.

Highest

ration

mode

value

(nearly

octaves

above

standard

pitch}.

Remember

that

doubling

the

coarse

and

fine

parameter

values

raises

the

pitch

the

operator

one

octave.

ratio

mode,

octaves

below

and

above

the

standard

pitch

are

obtained

values

0.50,

1.00,

2.00,

4.00,

8.00,

and

on.

The

ratio

value

forming

fifth

with

the

standard

pitch

obtained

1.50

and

the

ratio

value

forming

third

with

the

standard

pitch

obtained

1.25.

The

detune

parameter

provides

"super

fine"

frequency

control

for

each

operator.

used

shift

the

frequency

operator

much

cents

down

cent

1/lOOth

semitone).

This

parameter

independent

the

coarse

and

fine

parameters.

-7

Shift

operator

frequency

down

cents.

not

shift

operator

frequency.

Shift

operator

frequency

cents.

-7-

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