Doepfer A-118 Handleiding

Doepfer Niet gecategoriseerd A-118

Lees hieronder de 📖 handleiding in het Nederlandse voor Doepfer A-118 (6 pagina's) in de categorie Niet gecategoriseerd. Deze handleiding was nuttig voor 26 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

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doepfer System A - 100 NOISE / RANDOM A-118

1. Introduction

Module A-118 (NOISE / RANDOM) is (as you might

have guessed) a noise and random voltage genera-

tor.

It produces three types of signal: white noise, colo-

red noise, and random voltage.

White and colored noise can be used as audio sour-

ces, and also, in conjunction with a sample & hold

module, as control voltages, and the random voltage is

a useful source of voltage control, especially for its low

frequency content.

The A-118 gives you the ability to mix the relative

amounts of Red (low frequency component) and Blue

noise (high frequency component) in the colored noise

output.

There are knobs to control the rate of change and

amplitude of the random voltage, and two LEDs indi-

cate the state of the voltage at any one time.

Blue

Colored

Random

Output

Rate

White

A-118

NOI S E / RANDOM

Random Control

- +

Red

Level

A-118 NOISE / RANDOM System A - 100 doepfer

2. NOISE / RANDOM - Overview Controls:

1 Blue: Control for blue noise component at

colored noise output "

2 Red: Control for red noise component at

colored noise output "

3 Rate: Control for the cycle time of the

random voltage at output §

4 Level: Control for the amplitude of the ran-

dom voltage at output §

5 Random Control: LEDs indicating the state of the

random voltage at output §

In / Outputs:

! White: White noise output

" Colored: Colored noise output

§ Random Output: Random voltage output

A-118

NOISE /

RANDOM

Colored

Random

Output

Red

Rate

Level

Random

Control

Blue

White

➊

➋

➌

➀

➁

➂

➃

➄

010

0 10

010

doepfer System A - 100 NOISE / RANDOM A-118

3. Controls

The A-118 produces white and colored noise. White

noise contains all audio frequencies, at random ampli-

tude. The spectrum of white noise is completely flat -

ie. each section of the sound spectrum contains the

same amount of energy (see Fig. 1).

Another type of noise is pink noise. This also contains

all audio frequencies, but with equal weighting for each

octave rather than each frequency, so the higher

frequencies get progressively quieter (see Fig. 1).

Fig. 1: Spectra of white and pink noise

1 Blue

Use control 1 to adjust the amount of blue noise (the

high frequency components) in the signal at

output " .

2 Red

Use control 2 to adjust the amount of red noise (the

low frequency components) in the signal at

output " .

3 Rate

Use control 3 to adjust the cycle time T of the

random voltage at output §. T is a theoretical figure,

because of the random voltages the module produces.

In practice, a setting of 0 on the knob means fast

changes in voltage, producing a spectrum similar to

pink noise (see Fig. 2); and 10 means slow changes

(see Fig. 3).

Remark: The random voltage is derived from the colo-

red noise output by low pass filtering. Consequently

the settings Blue and Red will affect the random

output. If desired the random voltage can be derived

from the white noise output. Please refer to the A-100

service manual or contact Doepfer if you want to

modify your A-118.

1 Hz 15 Hz 20 kHz

Frequency

➨

➨➨

➨

pink

white

Product specificaties

Merk:	Doepfer
Categorie:	Niet gecategoriseerd
Model:	A-118

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