Korg Prologue16 16-Voice Polyphonic Analog Synthesizer - 61-Keyprologue is a fully programmable, full featured, professional synthesizer. Preceded by the four voice polyphonic minilogue and the monophonic monologue, its the long awaited debut of the flagship: the prologue. prologue is a polyphonic analog synthesizer equipped with a full sized keyboard. With powerful analog circuits that are descended directly from the earlier models of the series, together with a newly developed digital multi engine and gorgeous