Read more Casio Celviano AP-470 The Celviano AP-470 includes two stunning grand piano sounds, with varieties of each to suit any mood. The AiR Sound Source delivers incredible piano realism with advanced sympathetic string resonance, which highlights the complex harmonic relationships between undamped strings. Damper resonance, hammer response and lid simulation add even greater detail, capturing every nuance of your performance. A total of 22 Tones are provided, including electric pianos, organs, and other essential instruments. Adjustable Chorus and Brilliance are included along with a Hall Simulator, which places your piano in a virtual concert space of your choice.