The PSR2100 is loaded with amazing voices. In fact, there are well over seven hundred sounds including beautiful grand pianos, rich acoustic instruments, sparkling synthesizers and a full set of Yamaha XG voices. You can rest assured that XG and General MIDI sequences The PSR2100 features a dedicated organ flute function The PSR2100 has the same Vocal Harmony function as the PSR-9000 and 9000 Pro. Hook a microphone up to the PSR2100, sing into it, and you can sound like a choir