The modulation section contains two LFOs. The Shift LFO parameters on the left side control the Formant Shift parameter, and the Fade LFO parameters on the right side control the Fade AB parameter.
Shift LFO Intensity slider: Set the amount of Formant Shift modulation by the Shift LFO.
Rate knobs and fields: Set the speed of modulation. Values to the left are synchronized with the Logic Pro X tempo and include bar values, triplet values, and so on. Values to the right are nonsynchronized, or free, 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.
Waveform buttons: Set the waveform type used by the Shift LFO (left column) or the Fade LFO (right column). You can choose from the following waveforms for each LFO:
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)
Random stepped waveform (S&H)
Smoothed random waveform
Fade LFO Intensity slider: Control the amount of Fade AB modulation by the Fade LFO.
Tip: LFO modulations are the key to interesting effects. Set up either completely different or complementary filter curves in both filter banks. You can use rhythmic material—such as a drum loop—as an input signal, and set up tempo-synchronized modulations, with different rates for each LFO. Also try inserting a tempo-synchronized delay effect—such as Tape Delay—after the EVOC 20 Filterbank to produce unique polyrhythms.