 A polyphonic version of the Evolver, dubbed the Poly Evolver, was released in 2004 as a rackmount version, then a 61-key keyboard version of the Poly Evolver was released in 2005.The Evolvers were replaced by new high end models, the Prophet 12 and the Pro 2.Smith worked on a number of synthesizers in the past, such as the revolutionary Prophet 5, the Korg Wavestation (a direct descendant of the Prophet VS), and the first professional software synthesizer, "Reality".