PPG wave 2.2 - Adjusting the Filters; Adjusting the Resonance Intensity; Adjusting the Cutoff-Frequency of the Filters

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3.

Adjusting

the

filters

3.1.

Adjusting

the

resonance

intensity

The

instrument

is

opened

and

power

is

on.

Call

up

program

74

group

A

(original

PPG

program).

Tune

the

instrument

to

440

Hz

(TTUNE:

440)-

Choose

group

A

for

adjusting

the

resonance.

After

power

ON.

the

voices

of

the

WAVE

2.2

are

in

the

normal

order.

Each

time

you

press

a

key

the

next

voice

gets

enabled.

(in

the

sequence

1.2.3

4.5.6.7.8)

Now

press

the

first

key.

in

the

centre

of

the

keyboard,

and

adjust

the

trim-pot

so.

that

the

filter

resonance

is

dirictly

before

self-osci11ation.

Press

the

same

key

again

and

trim

the

next

voice.

Go

through

all

the

8

voices

this

way.

It

is

important

that

they

are

all

trimmed

to

the

same

intensity.

3.2.

Adjusting

the

cutoff-frequency

of

the

filters

Swith

to

group

B

(program

74).

Press

a

key

in

the

higher

range

of

the

keyboard,

and

adjust

the

cutof.f-f

r

equency

so

that

it

becomes

equal

to

the

fundamental

frequency

of

the

tonegenerator.

Do

the

same

procedure

for

all

the

8

voires.

The

positiones

of

the

trim-pot

s

you

find

in

the

drawing

below.