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Shepard Filter

A very simple implementation of a Shepard filter

(37 Votes)
3.0 (Updated 16 years ago)
February 02, 2005
Reaktor 5 or lower
Effect Other


This is a very simple implementation of a Shepard filter which uses equidistant bandpass filters with ascending or descending center frequencies to simulate a filter effect version of Shepard tones (also known as Risset tones). The effect is similar to Sean Costello's Barberpole Phaser, although it is accomplished by different means. The number of voices determine the number of equidistant bandpass filters.

v. 2.0: added control for width of the Shepard filter

v. 3.0: is now stereo


Peter Ehrlich
11 years ago
very nice
Kimmo Kivelä
13 years ago
My favorite spazer.
14 years ago
Very unusual and interesting effect.
15 years ago
It's the first time I use a filter like this one and it seems very interesting. Thank you Stephen. Thomas Grey
Walt Jones
16 years ago
Sounds great. Well done!
Roland Weinschütz
16 years ago
Stephen, thank you very much! As for MIDI controlling: The range for the center frequency is to wide for guitar, but I'll experiment on that. I'm looking forward to integrating your filter into TheGuitarProject.
Red Wierenga
16 years ago
Ok, it is now stereo.
Red Wierenga
16 years ago
Roland: I will work on a stereo version. If I understand you correctly, to make the center controlled my MIDI, just right-click the knob, select MIDI Learn, and then move the MIDI controller to which you would like to assign it. Moisture just fades between the dry input signal and the wet, processed signal.
Roland Weinschütz
16 years ago
It creates inspiring sounds combined with a fuzzed guitar! I'd make it stereo and make the center frequency controllable by MIDI. BTW: in what way does moisture modify the sound?
takeshi nakamura
16 years ago
It is very simple. But, I think that it obtains the target.
Norman Wilson
16 years ago
My first first download.