The AP-650 is the flagship Celviano digital piano offering cutting edge design with premium craftsmanship to create Casio’s ultimate expressive digital piano. Exceptional piano sounds and keyboard feel is provided by the Tri-Sensor Scaled Hammer Action Keyboard II, whilst the Multi-Dimensional Morphing AiR Sound Source provides rich, resonating tones inherent to a grand piano. The ground breaking multi-dimensional Morphing AiR sound source creates the richest and most authentic tones, which is incorporated into all 88 keys. Thus the stereo resonance simulator is able to reproduce string sounds of grand piano to an astonishingly realistic level.
The AP650 also features 128-voice polyphony, 180 styles, 6 demonstration-only songs, 180 one touch preset, split & layer functions, DSP, 16-track sequencer, chorus, brilliance, 2-track sequencer, hammer response, damper resonance, Lid- and Key-of-Simulator, audio recording/playback, 60 songs, transposer, metronome, duett mode.
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To restoring Casio AP-650M to it’s factory settings, just simply power ON while simultaneously holding the [GM TONES] and [FUNCTION] buttons.
Warning! This operation returns all settings you’ve made in the menus to their factory-set condition. Do not use this function unless you are certain that you want to do this. Hopefully the article of “Reset Casio AP-650M Celviano Digital Piano” can help you.
Reference: Casio AP-650M manual