Manual

A-110

VCO

System A - 100

doepfer

4. Controls

1 Range

Footage (the octave of the fundamental) is controlled

with this knob. Five settings are available, giving a wide

frequency range.

2 Tune

The TUNE control enables Fine Tuning of the oscilla-

tor frequency in a range of roughly ± ½ Octave. For

precise tuning, an electronic tuner is recommended.

If two or more oscillators are controlled by the

same control voltages, and set to the same

footage, you can use the TUNE knob to

de-tune one or more of the oscillators relative

to each other.

This can produce vibrato and chorus-like

effects, perfect for soundscapes and gene-

rally rich timbres.

3 CV 2

The pitch of the VCO is controlled by the voltages

present at inputs " and §. The amount the control

voltage at input § affects VCO pitch can be controlled

with Attenuator 3 (see also §).

4 PW

You use control 4 to alter the pulse width of the square

wave appearing at output & (see Fig. 2 and &).

5 PW CV 2

The pulse width of the square wave can also be altered

or modulated by voltage control from inputs $ and/or

%. The level of the PW CV 2 (input %) affecting the

pulse width can be set with gain control 5 (see also

%).