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Chapter 12 Retro Synth 231
Retro Synth LFO and Vibrato
Retro Synth’s LFO (Low Frequency Oscillator) is a multiwaveform, polyphonic modulation
generator that modulates each voice, or note you play, individually. It can be used as a source for
multiple modulation targets.
Retro Synth also provides a dedicated Vibrato LFO for pitch modulation.
Although they are oscillators, LFOs are not audible—but their eects can certainly be heard. The
sole purpose of an LFO is to modulate other sound generating elements of the synthesizer.
LFO/Vibrato tabs
Rate slider
LFO Sync switch
Source pop-up menu
Waveform display
LFO/Vibrato parameters
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LFO/Vibrato tabs: Click to change LFO or Vibrato parameters.
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Waveform display: Click the buttons at the top of the display to independently choose an LFO
or Vibrato waveform.
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The sawtooth waves are suitable for bubbling, rhythmic eects.
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The triangle wave is suitable for vibrato and other evenly-modulated eects.
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The rectangular waves switch between two values, which is useful for stepping the oscillator
pitch by a fth, for example.
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LFO Sync button: Turn on to independently synchronize the LFO or Vibrato speed with the host
application tempo. Turn o to control the LFO or Vibrato speed manually.
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Rate slider: Drag to independently set the maximum LFO or Vibrato speed.
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Source pop-up menu: By default, your MIDI keyboard modulation wheel changes the LFO or
Vibrato speed (Rate slider). You can choose aftertouch or both aftertouch and your keyboard’s
modulation wheel to control the Rate parameter.