Logic Pro EVOC 20 TrackOscillator modulation

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.

Figure. Modulation parameters.

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 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.

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