Yamaha SPX90 SPX90 Owners Manual Image - Page 11

DESCRIPTION

OF

PROGRAMS

AND

PARAMETERS

The

preset

programs

in

the

SPX90

fall

into

the

following

types:

REV

(Reverb),

ER1

and

ER2

(Early

Reflections),

DELAY,

ECHO,

MOD

(Modulation),

GATE,

PITCH,

FREEZE,

PAN,

VIBRATO

and

PEQ

(parametric

equalizer).

Each

of

these

program

types

has

a

specific

selection

of

programmable

parameters.

"Parameters"

indicates

the

separate,

individual

functions

that

make

up

each

effect.

There

are

two

types

of

parameters

in

the

SPX90:

"invisible"

parameters

(non

-programmable,

fixed

-value

parameters)

and

programmable

parameters

(those

you

can

edit,

or

modify).

REV

(REVERB)

Most

commonly

associated

with

musical

"ambience,"

reverberation

is

a

result

of

myriad

reflected

sound

waves

within

an

acoustical

environment,

i.e.

a

concert

hall,

auditorium,

or

soundstage.

The

SPX90

creates

extremely

vibrant,

natural

sounding

reverb.

(dB)

DIRECT

SIGNAL

60dB

REVERB

SIGNAL

DELAY

REVERB

TIME

(TIME)

1.

REVERBERATION

TIME

(R/T).

Range:

0.3

—99.0

sec

The

length

of

the

time

it

takes

for

the

level

of

re-

verberation

at

1

kHz

to

decrease

by

60

d

B—

virtually

to

silence.

In

a

live

setting

,

this

depends

on

several

factors:

room

size,

room

shape,

type

of

reflective

surfaces,

among

others.

2.

HIGH

(High

Frequency

Reverb

Time

Ratio).

Range:

0.1

-

1.0

Natural

reverberation

varies

according

to

the

fre-

quency

of

the

sound—

the

higher

the

frequency,

the

more

the

sound

tends

to

be

absorbed

by

walls.

furnishings,

and

even

air.

This

parameter

permits

you

to

alter

the

reverberation

time

of

the

high

fre-

quencies

in

proportion

to

the

mid

-frequency

reverb

time.

3.

DELAY.

Range:

0.1

-

50.0

msec

For

a

listener

in

a

concert

hall,

there

is

a

time

delay

between

the

direct

sound

of

the

instrument,

and

the

first

of

the

many

reflected

sounds

that

together

are

known

as

reverberation.

On

the

SPX90,

this

is

known

as

the

DELAY

time.

4.

HPF

(High

Pass

Filter):

Range.

THRU,

32

Hz

-

1

kHz

Permits

cutting

the

low

frequency

content

of

the

reverb

signal

below

the

set

frequency.

When

set

to

THRU,

the

HPF

is

OFF.

5.

LPF

(Low

Pass

Filter).

Range:

1

kHz

-

11

kHz,

THRU

Permits

cutting

the

high

frequency

content

of

the

reverb

signal

above

the

set

frequency.

When

set

to

THRU,

the

LPF

is

OFF.

ER1

and

ER2

(Early

Reflections)

"Early

Reflection"

effects.

ER1

has

fewer

reflections,

and

is

a

LOW

DENSITY

early

reflection

effect,

while

ER2

has

more

reflections,

and

is

a

HIGH

DENSITY

early

reflection

effect.

EARLY

DIRECT

REFLECTIONS

(dB)

SIGNAL

LIVENESS

DELAY

(TIME)

ROOM

SIZE

TYPE

HALL

F1

1111j1

AN[

111

0

I

r

i

v

I

i

REVERSE

1.

TYPE.

Range:

HALL,

RANDOM,

PLATE,

RE-

VERSE

TYPE

selects

the

pattern

of

the

earliest

reflections

of

the

reverb

sound.

All

"Early

Reflection"

presets

are

switchable

between

4

different

types.

These

are

HALL

(a

typical

grouping

of

early

reflections

that

would

occur

in

a

performing

environment

like

a

hall),

RANDOM

(an

irregular

series

of

reflections

that

could

not

occur

naturally),

PLATE

(a

typical

grouping

of

early

reflections

that

would

occur

in

a

plate

reverb

unit),

and

REVERSE

(a

series

of

re-

flections

that

increase

in

level,

like

the

effect

pro-

duced

by

playing

a

recorded

reverb/echo

back-

wards).

See

the

E/R

Mode

chart

on

page

26.

2.

ROOM

SIZE.

Range:

1.0

—

20.0

The

ROOM

SIZE

parameter

sets

the

time

"gaps"

between

the

early

reflections

—directly

propor-

tionate

to

the

size

of

the

room.

The

effect

of

this

parameter

also

depends

on

which

Early

Reflection

mode

has

been

selected.

A

Room

Size

Chart

can

be

found

on

page

27

in

this

manual.

3.

LIVENESS.

Range:

0

—10

Refers

to

the

rate

at

which

the

reflected

sounds

fade.

Set

this

parameter

at

zero

to

simulate

an

acoustically

"dead"

room,

with

absorbent

surfaces

to

"soak

up"

the

reflected

sounds.

As

you

increase

the

setting,

the

room

appears

to

contain

more

"live"

surfaces,

with

the

reflected

sounds

fading

more

slowly,

as

they

reflect

from

wall

to

wall,

until

at

the

maximum

setting

the

effect

is

of

an

intensely

reflective

envi-

ronment

containing

many

highly

polished

surfaces

(tiles,

glass,

etc).

4.

DELAY.

Range:

0.1

—

400

msec

The

time

delay

between

the

direct

sound

of

the

instrument

and

the

first

reflection

to

reach

the

listener's

ear.

5.

LPF

Range:

1

kHz

-

11

kHz,

THRU

Same

function

as

the

LPF

parameter

of

the

REV

program.

10

Yamaha SPX90 SPX90 Owners Manual Image - Page 11

Description, Programs, Parameters - reverse reverb

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