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3rd Wave User Manual
Filter Envelope
Exploring the State-Variable lter:
1. Recall the Basic Program by pressing the global button and using soft
knob 1 to navigate to the set init program command, then turn soft
knob 2 (go).
2. Turn the
mode knob all way to the left so that the lter is set to lp (Low-
Pass mode).
3. Hold down a note and rotate the lter’s
cutoff knob. Notice how it cuts
the high frequencies as you rotate counter-clockwise, making the sound
less bright.
4. Turn the lter’s
mode knob to notch and rotate the cutoff knob again.
Listen to the effect as the lter cuts a band of frequencies centered
around the cutoff frequency.
5. Now turn the lter’s
state knob to hp (high-pass) and rotate the cutoff
knob again. Listen to the effect as the lter removes the low-frequen-
cies from the sound.
6. Now press the bandpass button and rotate the cutoff knob again.
This time, the lter removes frequencies above and below the cutoff
frequency.
7. Finally, turn the resonance knob to its center positions and repeat steps
3-6 to hear the effect.
There are many intermediate states between the lp, notch, and hp
settings. This is one of the reasons that the State-Variable lter is so
versatile.
Filter Envelope
The 3rd Wave lter has a dedicated, 4-stage envelope generator (ADSR)
with an additional delay parameter, which you can use to delay the
onset of the envelope. The Filter Envelope is used to shape the harmonic
characteristics of a sound by giving you ltering control over its attack,
decay, sustain, and release stages.
Without an envelope, the lters would stay open or closed by the amount
set by the Cutoff knob — and it wouldn’t change over the duration of a
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