The LFO provides a cyclical (recurring or repeating) change of a parameter. The POLYMORPH has
3 LFOs. You have 3 buttons to choose which of the 3 LFOs you would like to work with. All of
these LFOs have a fixed modulation destination.
[PWM] PULSE WIDTH MODULATION (LFO-1)
This button puts the parameter of the pulse width modulation LFO under the control of the LFO
section (hence varying its amplitude / volume over time for a tremolo effect.) This LFO creates a
modulation of the pulse width of oscillator 1. If oscillator 1 is in the sync operation mode, the
frequency of the auxiliary oscillator is controlled by this LFO.
[VCO-FM] FREQUENCY MODULATION OF THE OSCILLATORS (VIBRATO) (LFO-2)
This button puts the parameter of the frequency modulation LFO under the control of the LFO
section. This LFO creates a vibrato.
[VCF-MOD] FILTER CUTOFF FREQUENCY MODULATION (LFO-3)
This button puts the parameter of the filter cutoff frequency LFO under the control of the LFO
section. This LFO causes the opening and closing of the filter. In the edit menu the modulation
depth for the high and low-pass filter can be varied. In addition this LFO can influence the volume
of the signals. Check the "Amp" menu for that.
<LFO-WAVE> WAVEFORM OF THE MODULATION GENERATOR
This control is used for the selection of the waveform, with which the LFO swings. The available
waveforms are printed on the operating surface.
KEY
SIN = sine
SWD = sawtooth down
SWU = sawtooth up
SQR = square
TRL = triangle
RND = random
<LFO RATE> SPEED OF THE MODULATION GENERATOR
This control is for the adjustment of the modulation speed. A special function is available with
values higher than 120. These are synchronized speeds. With this settings, the LFO's adapt their
speed to the speed of the internal or external sequencer.
1/16
-
The modulation frequency represents 16 periods per bar.
1/8
-
The modulation frequency represents 8 periods per bar.
_
-
The modulation frequency represents 4 periods per bar.
_
-
The modulation frequency represents 2 periods per bar.
1/1
-
The modulation frequency represents 1 period per bar.
2/1
-
A cycle passes through after two bars.
4/1
-
A cycle passes through after four bars.
<LFO DEPTH> LEVEL OF THE MODULATION
This control sets the depth of the modulation effect.
19
Basics
SQR
SIN
TRL
SWD
RND
SWU
LFO-Waves of the POLYMORPH
See page 32
