DFM1 is a digitally modelled analog filter.1 It provides low-pass and high-pass filtering. The filter can be overdriven and will self-oscillate at high resonances.
gain applied to the input signal
set to 0.0 for low-pass or 1.0 for high-pass
amplitude of noise added to the model
For questions regarding the function of DFM1 within SuperCollider contact Jonny Stutters <firstname.lastname@example.org>