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Chapter 6 Filter eects 12 0
AutoFilter lter
The Filter parameters allow you to precisely tailor the tonal color.
Filter parameters
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Cuto knob and eld: Rotate to set the cuto frequency for the lter. Higher frequencies are
attenuated, whereas lower frequencies are allowed to pass through in a lowpass lter. The
reverse is true in a highpass lter. When the State Variable Filter is set to bandpass (BP) mode,
the lter cuto determines the center frequency of the frequency band that is allowed to pass.
•
Resonance knob and eld: Rotate to boost or cut signals in the frequency band that surrounds
the cuto frequency. Very high Resonance values cause the lter to begin oscillating at the
cuto frequency. This self-oscillation occurs before you reach the maximum Resonance value.
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Fatness slider and eld: Drag to boost the level of low frequency content. When you set Fatness
to its maximum value, adjusting Resonance has no eect on frequencies below the cuto
frequency. This parameter is used to compensate for a weak or “brittle” sound caused by high
resonance values, when in the lowpass lter mode.
•
State Variable Filter buttons: Switch the lter between highpass (HP), bandpass (BP), or lowpass
(LP) modes.
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4-Pole Lowpass Filter buttons: Click to set the slope of the lowpass lter to 6, 12, 18, or 24 dB
per octave.
Note: Clicking one of these buttons automatically chooses the lowpass (LP) lter and slope,
overriding any active State Variable Filter button.