a filter plug-in that allows for extremely steep
filtering. It achieves this by implementing high
order IIR filter design methods that are commonly
used in science and engineering, namely Butterworth,
Chebychev, inverse Chebychev and elliptic (aka Cauer)
filters. Each of these filter design methods can be
applied to create low-pass, high-pass, band-pass,
band-reject, high-/low-shelving and peak/dip filters
of orders up to 20.
EngineersFilter is free and is
available for Windows as a VST effect plug-in.