Adding nonlinearities to the classical Biquad algorithm. Implemented from Jatin Chowdhury's Nonlinear Biquad Filters.
Unstable, resonating, gritty low-pass, band-pass and high-pass filters.
Dirty Biquad is provided for demonstration purposes, and is not a fully-featured plugin. It has no custom GUI.
You can download the latest nightly build from a permalink to the latest nightly builds here.
- Try the various nonlinearities. The "Linear" one is no clipping at all, and "Clipped" is hard clipping, which both sound similar unless driven.
- The "nonlinear biquad" model does not attempt to counteract the drift of the cutoff introduced by the saturation, and so louder sounds will "open" the cutoff of the filter by themselves.