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Chapter 3 ES2 56
Modulate ES2’s Filter 2 Frequency
Filter 2 cuto frequency can be modulated by the sine wave of oscillator 1, which is always
generated, even when the oscillator is switched o. The level of this sine signal can be mixed
in at the output stage with the Sine Level parameter (see Sine Level enhanced ES2 sounds on
page 57).
The eect of such lter modulations in the audio spectrum is unpredictable, but the results tend
to remain harmonic if you avoid high modulation intensity values. The FM parameter is used to
dene the intensity of this lter frequency modulation.
Note: Don’t confuse this lter frequency modulation with the oscillator FM feature (oscillator 1
is modulated by oscillator 2). If oscillator 1 is frequency-modulated by oscillator 2, it does not
inuence the sine wave signal used to modulate the cuto frequencies. See Use frequency
modulation in ES2.
Filter 2 can also be driven to self-oscillation. If you set a very high resonance value, it produces a
sine wave. This self-oscillating sine wave distorts at the maximum resonance value. If you mute
all oscillators, you’ll only hear this sine oscillation. By modulating the cuto frequency, you can
produce eects similar to those produced by modulating the frequency of oscillator 1 with
oscillator 2.
Modulate lter FM
1 Set up a modulation routing as follows: modulation target LPF FM.
A sine wave, at the frequency of oscillator 1, is always used as the modulation source. Given this
default assignment and the direct relationship between the lter FM intensity and oscillator 1’s
frequency, you can set up a second routing to modulate Oscillator 1’s pitch.
2 Set up a modulation routing as follows: modulation target Pitch 1, source LFO1.
3 Adjust LFO settings.