String Resonance : Yes (4 types, off), Damper Resonance : Yes (4 types, off), Key Action Noise : Yes (4 types, off), Damper Noise : Yes (4 types, off) Polyphony (Maximum) : 192, Number of Built-in Tones : 700, Sound Source : AiR, Layer : Yes, Split : Yes Number of Keys : 88, Key Action : Smart Scaled Hammer Action Keyboard, Touch Response : 5 sensitivity levels, off, Hammer Response : Yes, Key Off Response : Yes, 88 key digital scaled simulation : Yes