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Chapter 12 Retro Synth 227
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Cuto control: Drag the handle horizontally to set the brilliance of the signal.
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In a lowpass lter: the higher the Cuto frequency is set, the higher the frequencies of signals
that are allowed to pass.
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In a highpass lter: Cuto sets the point where low frequencies are suppressed.
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In a bandpass, band reject, or peak lter: Cuto sets the center frequency of the band that is
allowed to pass, is suppressed, or is emphasized.
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Resonance control: Drag the handle vertically to emphasize or suppress portions of the signal
above, below, or surrounding, the dened cuto frequency.
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Key (Follow) slider: Move to determine the eect that keyboard pitch (the note number) has on
lter cuto frequency modulation.
At the top position, the lter follows keyboard pitch, resulting in a constant relationship
between cuto frequency and pitch. This mirrors the properties of many acoustic instruments
where higher notes sound both brighter in tone and higher in pitch. At the bottom position,
the cuto frequency does not change, regardless of which key (pitch) you strike. This makes
the lower notes sound relatively brighter than the higher ones.
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Filter FM knob: Rotate to set the intensity of lter cuto frequency modulation with Oscillator
1’s sine wave generator. Positions to the left set the strength of static sine wave modulations.
Positions to the right set the strength of envelope-controlled sine wave modulations.
The centered (o) position disables lter frequency modulation by Oscillator 1’s sine
wave generator.
Note: Oscillator 1’s sine wave generator always generates a sine signal—at the frequency of
Oscillator 1.
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LFO knob: Rotate to set the strength of lter cuto frequency modulation with the LFO.
Positions further away from the centered (o) position make modulation more or less intense.
See Retro Synth LFO and Vibrato.
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Filter Env(elope) knob: Rotate to set the strength of lter cuto frequency modulation with the
Filter Envelope. Positions further away from the centered (o) position make modulation more
or less intense. See Retro Synth envelopes.