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Chapter 3 ES2 53
ES2 lter cuto and resonance
Filter cuto and resonance overview
In every lowpass lter (ES2: Lo mode for Filter 1; Filter 2 is a lowpass lter), all frequency
portions above the cuto frequency are suppressed, or cut o, hence the name. If you’re new to
synthesizers and the concepts behind lters, see Synthesizer basics overview on page 471.
Cuto and resonance parameters
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Cuto Frequency knob: Rotate to control 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, the cuto frequency determines the point where lower frequencies are
suppressed and only upper frequencies are allowed to pass.
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In a bandpass/band rejection lter, the cuto frequency determines the center frequency for
the bandpass or band rejection lter.
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Resonance knob: Rotate to emphasize or suppress portions of the signal above or below the
dened cuto frequency.
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In a lowpass lter, Resonance emphasizes or suppresses signals below the cuto frequency.
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In a highpass lter, Resonance emphasizes or suppresses signals above the cuto frequency.
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In bandpass/band rejection lters, resonance emphasizes or suppresses the portions of
the signal—the frequency band—that surround the dened frequency, set with the Cuto
Frequency parameter.