System Type: Hybrid acoustic + digital silent system; Sensor Type: Optical key sensors; Silent Mode: Hammer stop rail (no string strike); Sound Source: Schimmel sampled piano voices; Primary Voices: Schimmel K230 Concert Grand, K122 Upright; Polyphony: Up to 256 notes (system-dependent); Headphone Output: Dual 3.5 mm stereo jacks; MIDI: MIDI In/Out (USB or DIN depending on model); Additional Sounds: Electric piano, organ, harpsichord, strings (varies); Recording: Internal / SD card (on equipped versions); Control Interface: Integrated touchscreen / under-keyboard unit; Pedal Integration: Standard upright pedal system (silent mode via center pedal/system activation); Installation: GPH is an authorized dealer. Contact us for installation price