"Filther is an AudioUnit effect plugin that adds color and character to any sound. At it's heart is a steep -48 dB/octave low-pass filter with innovative dual-stage waveshaping distortion. Coupled with an input envelope follower, this filter can do anything from deep low-end isolation, juicy wah-wah to growling sweeps and waveform sculpting."
- Eight-pole, -48 dB/octave low-pass filter with dual-stage waveshaping distortion.
- One-pole finishing high-pass filter.
- Input envelope follower with adjustable sensitivity and smoothness.
- Intuitive, resolution-independent user interface.
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Source via Music Informatory