AutoFilter filter controls in Logic Pro for iPad
The Filter parameters precisely tailor the tonal color.
Filter parameters
On/Off button: Turn the filter section on or off.
Cutoff knob and field: Set the cutoff frequency for the filter. Higher frequencies are attenuated, whereas lower frequencies are allowed to pass through in a lowpass filter. The reverse is true in a highpass filter. When the State Variable Filter is set to bandpass (BP) mode, the filter cutoff determines the center frequency of the frequency band that is allowed to pass.
Resonance knob and field: Boost or cut signals in the frequency band that surrounds the cutoff frequency. Very high Resonance values cause the filter to begin oscillating at the cutoff frequency. This self-oscillation occurs before you reach the maximum Resonance value.
Filter Mode pop-up menu: Switch the filter between multimode highpass (MM HP), bandpass (MM BP), lowpass (MM LP), or peak (PK) modes, or choose a lowpass filter with a slope of 6, 12, 18, or 24 dB per octave.
Fatness knob and field: Boost the level of low frequency content. When you set Fatness to its maximum value, adjusting Resonance has no effect on frequencies below the cutoff frequency. This parameter is used to compensate for a weak or “brittle” sound caused by high resonance values, when in the lowpass filter mode.
Stereo Spread knob and field: Set the stereo spread width.
Filter Modulation parameters
Env Cutoff Mod knob and field: Determine the impact of the envelope on cutoff frequency.
LFO Cutoff Mod knob and field: Determine the impact of the LFO on cutoff frequency.
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