Introduced in the early 1970s, the Omnipressor was the first dynamics effects processor of any kind, suddenly making possible a new, wide range of effects like its unique dynamic reversal, infinite compression, variable gating, and the use of a separate sidechain. Originally invented by Eventide’s founder, Richard Factor (and later redesigned for production by Jon Paul), the Omnipressor made a host of dynamic effects possible. It featured variable control of all aspects of dynamic modification. It also introduced the notion of the ‘side chain’ and foretold techniques that today we take for granted like ‘look ahead’ processing.