Well, no, not THAT filter. We're talking about synth filters. Sorry, Richard Patrick. Maybe next time.
Much as oscillators have different “flavors” in the form of waveforms, filters come in a variety of different types, too. The reality is, some softsynths these days have a mind-bending array of different filter types, but we’re going to concentrate on the 3 ‘basic’ types you are most likely to encounter: LOWPASS, HIGHPASS, and BANDPASS.