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hD Audio Unit is a distortion effect with harmonic generators. It can generate two pitch-shifted copies of up to two octaves above the input signal. It also has a sub-octave generator. hD's design uses its harmonic generators to enhance the distortion. The two harmonic voices are mixed into the signal before the distortion stage. We developed the sub-octave generator algorithm specifically for hD. It is latency-free. We place it after the distortion stage. This lets you get a good rumble without sounding like you've run a bass through a fuzz box. hD can also be used to generate 12-string guitar effects and as a note more...

What's New

Version 1.1:

  • The parameter and label colors can now be set by the user in the registration/preferences panel. The color settings will apply to all Twister AUs so that this only needs to be changed once.
  • Added more options for setting parameter values. Parameter displays can be still be controlled with the big knob. But, now you can now adjust parameter settings by dragging and more...


  • Mac OS X 10.4 or later
  • Audio Unit Host

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Current Version (1.x)


Downloads 1,619
Version Downloads 1,507
License Demo
Date 16 Aug 2006
Platform OS X / PPC 32 / Intel 32
Price $19.99
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