audio-controlled synthesizer AudioUnit plugin for OS X
Frequency is an AudioUnit effect plugin for creating unique synthesizer sounds. Its sound generation concept is based on a dual oscillator with additive waveforms and waveshape modeling, whose pitch comes from the built-in note sequencer and dynamics are taken from the input signal. With this combination, Frequency transforms any rhythmic material into a lively synthesizer instrument, all via a simple, color-coded interface.
Frequency works with Logic, GarageBand, Live, Maschine, Studio One, ReNoise, Reaper, Bidule and other Mac software that supports AudioUnit effect plugins. It comes in 32/64 bit versions for both Intel and PPC, and requires OS X version 10.5 or later.