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.