16 Voice version of the Prologue in excellent condition. Has installed 3rd party extras for the digital Multi-engine: Complete Oscillator Collection from Dirtbox Synth https://www.dirtboxsynth.com/sd_product/complete-oscillator-collection/ Whirl and SVF user FX from Sinevibes https://www.sinevibes.com/korgsvf https://www.sinevibes.com/korgwhirl Asking 2000$ More synth info: https://www.korg.com/caen/products/synthesizers/prologue/