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浄水器 DOEPFER A-120 VCF 1のPDF マニュアルをオンラインで閲覧またはダウンロードできます。DOEPFER A-120 VCF 1 8 ページ。 System a - 100

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5. User examples

The filter's cut-off frequency can be modulated in

various ways:

• VCF - LFO

Modulation of the cut-off frequency produces cycli-

cal changes of the

frequencies (c. 1 - 5 Hz), you get a "Wah-Wah"-

effect. Modulation in the audio range produces

interesting sounds; the same principles apply here

as with frequency modulation of the A-110 VCO

(see chapter 6).

• VCF - ADSR

Modulation by an envelope results in gradual

change of the sound spectrum. Typical uses

would be the synthesis of electric bass or drum

sounds, and filter sweeps, which slowly sweep

through the audio spectrum, emphasising different

harmonics.

• VCF - Keyboard CV

This modulation produces pitch-related filter ope-

ning: the higher the pitch, the more the filter opens,

and the brighter the sound becomes.

System A - 100

sound spectrum. At low

Producing wind FX with A-120 and A-118

D Patch coloured noise into the audio input, and

random voltage CV into CV2. Set the filter CV to 0,

cut-off to a middle value, and the resonance just

below self-oscillation.

D Now turn CV 2 up. A whistling wind sound will

occur. You can control the rate and amount of its

irregularity with controls 3 and 4 on the A-118, and

the tone colour with the A-118's controls 1 and 2.

A-118

NOISE / RANDOM

Blue

Red

Colored

Rate

Random

Level

Output

Random Control

Fig. 3: Creating wind effects

A-120

VCF 1

A-120

VCF 1

CV 2

Frequency

Level

Audio In

Audio

Resonance

Out