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Endless Series is four audio effect plugins based on an auditory illusion known as 'Circular Pitch' or more commonly the 'Shepard Tone/Scale' after Roger N. Shepard who discovered it in the 1960s. Shepard showed that using basic additive synthesis itÕs possible to create the illusion of a continuously rising or descending chromatic scale. The term circular pitch was used because, although the scale sounds as if it is moving in one direction, in fact, after twelve steps it returns to where it started.

'Endless Tone' can be used to synthesize classic Shepard tones. It can also be used as a ring modulator either using an more...

What's New

Version 3.10.2:

Note: The downloadable version is 3.10.2. The Mac App Store version is currently 3.2.

New features:

  • VST2 - added midi key labels for reset and step
  • VST3 - now supports program list (compliant hosts only)
  • VST3 - now supports right-click to bring up host's parameter context menu (vst3.5 compliant hosts only)
  • Updated manual
Bug more...


  • OS X 10.5 or later
  • 32-bit or 64-bit VST 2.4 or AudioUnit host

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5 1


Current Version (3.x)


Downloads 1,225
Version Downloads 197
License Demo
Date 26 Mar 2012
Platform Intel 64 / OS X
Price $9.99