DOEPFER Quad AD/LFO A-143-1 Manuale - Pagina 8

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Quad AD/LFO A-143-1

4. User Examples

The A-143-1 is suitable for all kinds of modulations where

normally LFOs or envelope generators are used. Please

refer to the user manuals of other envelope generators or

LFOs for details (i.e. all A-14x modules).

The units of the A-143-1 can be used as single devices or

several units can be combined to obtain complex envelopes

or LFOs. In principle any control voltage input can be

controlled by the A-143-1 to modulate the parameter in

question. Typical applications are:

 VCO Pitch/Frequency Modulation

Pitch/frequency modulation of a VCO produces vibrato.

 VCO Pulse Width Modulation

Pulse width modulation of a VCO produces cyclical

variation in tone colour (sounds similar to phasing)

 VCA Loudness Modulation

Modulation of the gain of a VCA produces Tremolo

 VCF Frequency or Resonance Modulation

Modulation of the cut-off frequency of a VCF produces

cyclical variation in tone colour. For some filters even the

resonance can be modulated.

 VCP Phase Shift Modulation

Phase shift modulation of a phaser (e.g. A-101-3 or A-

125) produces cyclic phasings or phase vibrato

By means of the universal vactrol module A-101-9 the

parameters A and D can be voltage controlled. Please

refer to the A-101-9 manual for details.

System A-100

A special application of the quad AD generator is the

subsequent control of up to four similar modules (e.g. VCAs,

VCFs, VC phasers, VC flangers, VC frequency shifters ...)

for quadrophonic sounds:

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