Touch sensitive keyboard with 76 keys (PSR-EW425) or 61 keys (PSR-E473) 820 Voices including Super Articulation Lite Voices Premium organ sound created with samples from high-end Yamaha YC Series (PSR-EW425 only) 64-note polyphony 290 auto accompaniment Styles Quick Sampling function Groove Creator function USB Audio Recorder Assignable real-time Control Knobs, Motion Effect functionality, pitch bend wheel Enhanced DSP power with DSP1: 41 types, DSP2: 12 types Mega Boost Melody Suppressor for both analog and digital audio input 12W + 12W amplification (PSR-EW425) / 6W + 6W amplification (PSR-E473) 12 cm Bass Reflexed speakers Microphone input and Vocal effects L&R outputs for connecting to a PA system USB TO HOST and USB TO DEVICE; USB Audio