I'm trying to recreate all the filter types in Logic's ES2 synthesizer:
So essentially, I want to build:
- a resonant lowpass
- resonant highpass
- 'peak' filter
- band reject filter
- band pass filter
- 12 dB resonant lowpass
- 18 dB resonant lowpass
- 24 dB resonant lowpass
with an optional "fat" setting that restores low frequencies when the resonance is turned up.
I'm very much a noob when it comes to low-level filter design. Is there any good tutorials/documents/places to start for a project like this?