26
Filters
Sequential
Exploring the State-Variable Filter
As its name suggests, the State-Variable lter can change its operational
mode/state from low-pass, to notch, to high-pass, with a separate band-
pass mode that you can activate using the bp (band-pass) button. This
makes the State-Variable lter very versatile.
Exploring the State-Variable lter:
1. Press the global button and use Soft Knob 1 to navigate to the basic
program command, then press Soft Button 1 (write now).
2. Press the state-variable button to select this lter.
3. Turn the state knob all way to the left so that the lter is set to lp (low-
pass mode).
4. 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.
5. Turn the lter’s state 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.
6. 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.
7. Now press the bp (band-pass) button and rotate the cutoff knob again.
This time, the lter removes frequencies above and below the cutoff
frequency.
8. Finally, turn the resonance knob to it’s center positions and repeat steps
3-6 to hear the effect.
Note that 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.
Modulating the state-variable lter’s operating mode with an envelope or LFO
can create many unique and interesting sounds. Set the modulation source to lfo and
the destination to sv lp-n-hp.
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