Hello,
Ported the Chebyshev filter from
http://www.musicdsp.org today
I think I've started to understand more from the math behind the transformations.
This one is Type1 - a classic filter model like the Moog.
http://en.wikipedia.org/wiki/Chebyshev_filter
[IMG]http://img393.**************/img393/3210/chebymn0.jpg[/IMG]
Latest screenshot:
[IMG]http://img262.**************/img262/7879/chebylatestkt4.jpg[/IMG]
- Mono/Stereo processing
- 24db
- LP, HP, BP modes (HP, BP are just subtractions from the LP algorithm)
- Limiter. You can drive your signal into it.
- "Passband ripple" amount control. Higher values may add a lot of resonance!!! It will produce 2 more noticeable peaks at the passband (from the ripple) - interesting results for those housemusic sweeps maybe. Unlike the Moog filter the overall volume will not drop to compensate for the resonance.
Fixes:
- Clipping produced some unwanted effects.
tbd:
- oversampling
- parameter interpolation (cutoff has some glitches when moving slider). Will be looking into this shortly!
unzip, place "cheby24db" file in Reaper/Effects folder.
LATEST VERSION:
http://forum.cockos.com/showthread.p...980#post246980
Enjoy