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Foldover distortion can also happen between separate oscillators when the sum of the
amplitudes (i.e. VOLUME sliders) of all four of the FI's oscillators exceeds 127. In clean
default sounds the oscillator master volumes are set to 32, thus avoiding foldover. The effect
of foldover distortion between oscillators that are tuned to different frequencies (either
coarsely or finely) is rather unpredictable so leaves a lot of room for experimentation.
Since each oscillator can be made to have two dynamically changing portions (PULSE
WIDTH and SAW VCA), these can be used to create sounds with dynamically changing
spectra, even without using a filter.
Distortion Block
The Distortion block applies distortion to the original instrument signal and to the three
transposed voices generated by the Harmonizer. VOICE1 is fixed at 1 octave above the
input signal, whereas the transpositions of VOICE2 and VOICE3 are variable.
The Distortion block is also the source of the A ttack/Release Distortion . See the detailed
explanation of
A ttack/Release
Moving from left to right, the sliders of the Distortion block are as follows:
● HARMONIZER TRANSPOSE VOICE2/VOICE3 (-12, -5, 7, 12, 19, 24):
Sets the transposition in semitones of the two variable voices. Identical settings of the
two voices are scaled such that they are not exactly equal and will have a slight
beating between them.
● HARM MIXER INSTR/VOICE1/VOICE2/VOICE3 (0...127):
Sets the volume levels of the input instrument signal and the three transposed voices
of the Harmonizer being sent to the distortion.
● DISTORTION GRADE (0...31):
Adjusts the degree of distortion. Even at 0, some distortion is still present.
● DISTORTION TONE (0...127):
Sets the tone of the distortion. The filter is an equalizer set to 2100 Hz and Q=0.8.
The slider cuts or boosts by up to 11dB at this frequency. A setting of 64 is flat (0dB).
T he Distortion block does not apply distortion to the s ynth signal. The distorted sound does
2
however get routed through the filter so can be shaped to create synth-like sounds.
2
Distortion in the V CF INPUT section of the V CF Block .
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