10.6

Table Of Contents
231Logic Pro Instruments
ES2 filter cutoff and resonance
Logic Pro ES2 filter cutoff and resonance overview
In every lowpass filter (ES2: Lo mode for Filter1; Filter2 is a lowpass filter), all frequency
portions above the cutoff frequency are suppressed, or cut off, hence the name. If you’re
new to synthesizers and the concepts behind filters, see Synthesizer basics overview.
Cutoff and resonance parameters
Cutoff Frequency knob: Control the brilliance of the signal.
In a lowpass filter, the higher the cutoff frequency is set, the higher the frequencies
of signals that are allowed to pass.
In a highpass filter, the cutoff frequency determines the point where lower
frequencies are suppressed and only upper frequencies are allowed to pass.
In a bandpass/band rejection filter, the cutoff frequency determines the center
frequency for the bandpass or band rejection filter.
Resonance knob: Emphasize or suppress portions of the signal above or below the
defined cutoff frequency.
In a lowpass filter, Resonance emphasizes or suppresses signals below the cutoff
frequency.
In a highpass filter, Resonance emphasizes or suppresses signals above the cutoff
frequency.
In bandpass/band rejection filters, resonance emphasizes or suppresses the portions
of the signal—the frequency band—that surround the defined frequency, set with the
Cutoff Frequency parameter.
Control two ES2 filter parameters simultaneously
The ability to change the Cutoff and Resonance controls at the same time is essential for
creating expressive synthesizer sounds.