Free Windows Music Software: Reichatron is a free phase shifting looper 
  effect for Reaktor 5, inspired by Steve 
  Reich and his early loop pieces.
  It was created by Matt Mower:
  Reichatron is a sample playing instrument that 
  grew out of my desire to experiment with phase-shifted looping (a la Steve 
  Reich’s early works It’s Gonna Rain and Piano Phase) and as 
  an homage to Metaphysical Function which is, I think, one of the most 
  interesting Reaktor ensembles.
  Reichatron allows you to mix together the 
  phase-shifted blending of two samples and then modulate that mixture using a 
  block of six effects that can be independently controlled. Reichatron also 
  offers stochastic control of the effects block and sample selection. You can 
  take as much, or as little, control over how the sound evolves over time as 
  you like.
  See also Phase Shifter, another audio effect inspired by 
  Reich