DOEPFER A-120 VCF 1 Podręcznik - Strona 3

Przeglądaj online lub pobierz pdf Podręcznik dla Systemy filtracji wody DOEPFER A-120 VCF 1. DOEPFER A-120 VCF 1 8 stron. System a - 100

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3. Controls

1 Freq.

With this control you adjust the Cut-Off Frequency f

above which the filter attenuates all frequencies. At 10,

the filter is fully open. The more you turn down this

control, the more the high frequencies are filtered.

The sound becomes mellower and less bright (see

Fig. 1) until at 0 the filter is completely shut, and there

will be no output signal at all.

Out

f c

Freq.

Fig. 1: White noise put through a low pass filter.

System A - 100

Out

f c

Freq.

2 CV 2

•

3 CV 3

For voltage control or modulation of the cut-off fre-

quency, use these CV inputs " and/or § (see Fig. 1).

Use attenuators 2 and/or 3 to adjust the control

voltage level.

4 Lev.

Use this attenuator to control the amount of signal

entering the filter input $.

If the filter's output distorts, turn this control

down, unless you deliberately want the

sound as a special effect.

5 Res.

With this control you adjust the filter's resonance

(emphasis) - the parameter which emphasises the

frequencies around the cut-off point f

p.4).

Close to its maximum setting, the filter becomes so

resonant that it goes into self-oscillation, and starts

behaving like a sine wave. You can take advantage

of this effect, and use the VCF as an additional oscilla-

tor.

A-120

VCF 1

(see Fig. 2 on