AutoFilter is a versatile filter effect with several unique features. You can use it to create classic, analog-style synthesizer effects, or as a tool for creative sound design.
The effect works by analyzing incoming signal levels through use of a threshold parameter. Any signal level that exceeds the threshold is used as a trigger for a synthesizer-style ADSR envelope or an LFO (low frequency oscillator). These control sources are used to dynamically modulate the filter cutoff.
AutoFilter lets you choose between different filter types and slopes, control the amount of resonance, add distortion for more aggressive sounds, and mix the original, dry signal with the processed signal.
The AutoFilter window is divided into Filter, Envelope, Distortion, LFO, and Output parameter sections.
Filter parameters: Control the tonal color of the filtered sound. See AutoFilter filter.
Envelope parameters: Define how the filter cutoff frequency is modulated over time. See AutoFilter envelope.
Distortion parameters: Distort the signal both before and after the filter. See AutoFilter distortion.
LFO parameters: Define how the filter cutoff frequency is modulated by the LFO. See AutoFilter LFO.
Output parameters: Set the level of both the dry and effect signal. See AutoFilter output.