EVOC 20 TrackOscillator modulation in Logic Pro for Mac
The parameters in this section control the LFO, which can be used to modulate either the pitch of the tracking oscillator, thus creating a vibrato, or the Formant Shift parameter of the synthesis filter bank.
Modulation parameters
Shift Intensity slider: Set the amount of formant shift modulation by the LFO.
Pitch Intensity slider: Set the amount of pitch modulation—vibrato—by the LFO.
Waveform buttons: Set the waveform type used by the LFO. You can choose from the following waveforms:
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
LFO Rate knob and field: Set the speed of modulation. Values to the left are synchronized with the Logic Pro 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.