Korg Opsix Owner's Manual page 43

When "MODE" is set to FLTR FM (Filter FM)
In Filter FM, the oscillator signal is used as audio input for the filter. The cutoff frequency is modulat-
ed using the input signals from the modulator(s). Depending on the cutoff and filter type settings,
this may not have any effect, as the sound outputted from the oscillator may not pass through the
filter.
The variations in sound are easier to understand if you set the WAVE parameter to SAW and then
change the filter type.
TYPE (Filter Type)
Sets the type of filter used in the Operator.
CUTOFF (Cutoff)
Although the filter cutoff frequency changes with the modulator's input signal, the center frequency
changes along with the oscillator pitch, so you can use this parameter to add an offset. This is set in
semitones.
RESO (Resonance)
Emphasizes the frequencies around the cutoff frequency.
When "MODE" is set to WAVE FLDR (Wave Folder)
This "folds" the waveform to create a powerful distortion effect.
GAIN
Adjusts the strength of the Wave Folder effect. Increasing this value will increase the number of times
that the waveform is folded.
OSC MIX (OSC Mix Level)
Sets the oscillator level inputted into the Wave Folder.
BIAS
Applies a DC offset to the input signal to change the harmonics.
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