X

Chapter 2 ES1 24
ES1 lter parameters
ES1 lter parameters overview
This section outlines the lter parameters of the ES1.
Filter parameters
•
Cuto slider: Drag to set the cuto frequency of the ES1’s lowpass lter.
•
Resonance slider: Drag to cut or boost the portions of the signal that surround the frequency
dened by the Cuto parameter. Boost can be set so intensively that the lter begins to
oscillate by itself (see Drive the ES1 lter to self-oscillate on page 25).
Tip: You can simultaneously adjust the cuto frequency and resonance parameters by
dragging vertically (cuto) or horizontally (resonance) on the word Filter, found in the center
of the black circle.
•
Slope buttons: The lowpass lter oers four dierent slopes of band rejection above the cuto
frequency. Click one of the buttons to choose a slope (amount of rejection, expressed in
decibels (dB) per octave):
•
24 dB classic: Mimics the behavior of a Moog lter. Turning up the resonance results in a
reduction of the low end of the signal.
•
24 dB fat: Compensates for the reduction of low frequency content caused by high
Resonance values. This resembles the behavior of an Oberheim lter.
•
12 dB: Provides a soft, smooth sound that is reminiscent of the early Oberheim
SEM synthesizer.
•
18 dB: Resembles the lter sound of Roland’s TB-303.
•
Drive slider: Drag to change the behavior of the Resonance parameter, which eventually
distorts the sound of the waveform. Drive is actually an input level control, which allows you
to overdrive the lter.