The PSR-S900 continues the Yamaha tradition of producing top-notch arranger keyboards. With 891 instrumental voices PSR-S900 offers the player a huge sonic palette. Most of these voices are coming from high end models - including 20 Live! Voices, 26 Cool! Voices and 22 Sweet! Voices as well as 15 Mega! Voices and even 23 Super Articulation Voices included. Features such as Vocal Harmony and the powerful Bass-Reflex make the PSR-S900 an incredible live performance tool, and the impressive array of sounds available make the PSR-S900 perfect for studio work as well.