User manual

analogue solutions Semblance/4Voice V2 e&oe (c) 21-10-2004

MODULATION SOURCE rotary switch

This selects the modulation source for either PWM or FM and is routed to the control

above.

The source options are;

EG1 for pitch sweeps. Good for percussion sounds

EXT1 for sound effects and additional modulation

LFO for vibrato and trill effects

VCO2 Square wave for frequency modulation effects

Select the source that you want to use to modulate PWM/FM.

PULSE WIDTH

This control allows manual shaping of the pulse wave output. It alters the pulse width

(duty cycle) of the pulse wave. In a central position a square wave is produced (50% duty

cycle). Try this control and listen to how the tone of the waveform changes. When using

Pulse Width Modulation, it is best to set the Pulse Width control to centre, otherwise the

sound may cut-out.

VCO2

FINE TUNE

Controls ﬁ ne pitch adjustment of VCO2. Use this to tune VCO2 to your other instru-

ments or VCO1.

TUNE

Controls the course pitch of VCO2. Range is about +/- 2 octaves. Use this to tune

VCO2 to your other instruments or to shift the VCO pitch up or down an octave compared

to the VCO1.