EVOC 20 PolySynth Modulation Parameters
The Modulation section offers two LFOs. The LFOs can run freely, or they can be synchronized with the host application tempo.
The Pitch LFO controls pitch modulation of the oscillators, enabling you to produce vibrato effects.
The Shift LFO controls the Formant Shift parameter of the synthesis filter bank, enabling you to produce dynamic phasing-like effects.
- Int via Whl slider: Defines the intensity of LFO pitch modulation. The right half of the slider determines the intensity when the modulation wheel is set to its maximum value, and the left half determines the intensity when the wheel is set to its minimum value. By dragging the area between the two slider segments, you can simultaneously move both. This parameter is permanently assigned to the modulation wheel of your MIDI keyboard (or corresponding MIDI data).
- Rate knobs: Determine the speed of modulation. Values to the left of the center positions are synchronized with the host application tempo and include bar values, triplet values, and more. Values to the right of the center positions are nonsynchronized, and are displayed in Hertz (cycles per second).
Note: The ability to use synchronous bar values could be used to perform a formant shift every four bars on a cycled one-bar percussion part, for example. Alternatively, you could perform the same formant shift on every eighth-note triplet within the same part. Either method can generate interesting results and can lead to new ideas, or add life to existing audio material.
- Waveform buttons: Set the waveform type used by the Pitch LFO on the left or the Shift LFO on the right. You can choose between triangle, falling and rising sawtooth, square up and down around zero (bipolar, good for trills), square up from zero (unipolar, good for changing between two definable pitches), a random stepped waveform (S & H), and a smoothed random waveform for each LFO.