Wah_ml:
Not really a wah emulation, just a great moog ladder filter set up to be
used in real time like a wah. Has controls for top and bottom level of
the filter cutoff (0-10) so you can set the cutoff range.
BugPass 1.1 - is a a dual-function plug-in. Its primary job is to serve as a bandpass filter, with sliders which enable a quick visual reference to the size of the frequency band being passed through. However, by reversing the sliderpositions, BugPass will also serve as a notch filter, eliminating frequencies between the sliders while leaving the remaining frequencies intact.
free vst plugin, pc.
Northpole:
This free plug in equips your sequencing environment with a fully programmable resonant filter. In short, you can send any of your audio tracks through this 'virtual analog' device to either create special effects or to simulate the behaviour of an analog 4-pole filter. It has the following specifications
free vst plugin. pc, mac