One of the chief attractions of the acoustic piano is its ability to produce countless subtle changes in tonal reverberation in response to delicate adjustments of the pianist’s touch.

CASIO’s newly developed Acoustic and Intelligent Resonator (AiR) sound source faithfully reproduces these nuanced tonal variations unique to the piano. Not only the lingering reverberation from the time the sound starts until it expires, but also the rich resonance of strings reverberating together, can be reproduced depending on the force with which the keys are struck.

CASIO digital pianos enable pianists to play the same piece of music in innumerable styles, depending on their intended effect. The optimal resonance produced by innovative LSI technologies proprietary to CASIO will, we believe, impress piano lovers everywhere.

The characteristics of CASIO’s newly developed Multi-dimensional Morphing AiR* Sound Source are demonstrated through attention to detail in expressing the rich, resonating tones inherent to a piano.

The temporal changes in tone that create sound you would expect only from a piano, beginning with the initial sound and leading into a beautiful extension until the sound eventually disperses, are reproduced naturally. Even the length of the reverberation can be controlled at will by the player by adjustments in touch, as with an acoustic piano. Seamless variations that respond continuously to the power behind each stroke, not only in terms of volume but also in terms of the nuances of the sound itself, range from a fine and gentle ppp (pianississimo), to an intense and powerful fff (fortississimo). All 88 keys incorporate a stereo resonance simulator that realistically reproduces the string sounds of a grand piano.

The pleasure of listening to acoustic changes can be obtained by opening the grand piano-like lid installed on high-end models (PX-850, AP-650M, AP-450), which places a particular focus on sound output quality. These developments represent an unprecedented evolution of the digital piano’s expressive power in the areas of both sound and resonance.

The acoustic level achieved by a digital piano is determined by the capacity of the memory that stores sounds after sampling. A new high-capacity memory, boasting a capacity in excess of approximately three times our previous models, is the foundation of our Multi-Dimensional Morphing AiR Sound Source.

The waveform data sampling capacity has increased dramatically, enabling natural reproduction of the delicate changes in waveforms associated with concert grand pianos. The sound quality and resonance have evolved dramatically, now having the ability to produce simultaneous sounds comprising of up to 256 notes in our high-end models (PX-850, AP-650M, AP-450).

Digital pianos normally compress and record sound waveform data in their built-in memory. This data is then expanded and played back when recalled. This process is similar to the compressed audio data in MP3 files, and similarly, the replayed sound suffers from digital deterioration in comparison to the original sound.

The advanced Lossless Audio Compression technology adopted for CASIO’s Multi-Dimensional Morphing AiR Sound Source has made it possible to reproduce sounds without this deterioration of the original sound quality. Quite simply, this reproduces musical performances with acoustics that are immeasurably closer to natural piano sounds.

Achieving deep, rich resonance
with 88 keys

The uniquely rich sound produced by an acoustic piano is a combination of the sound generated by the striking of keys and the associated string resonance created by that original key strike. The Multi-Dimensional Morphing AiR Sound Source, unlike ordinary digital pianos, adopts a string resonance system incorporating a stereo resonance simulator for all 88 keys – meaning that the resonance of all 88 keys is reproduced completely and naturally. Furthermore, the resonance created by playing a single tone, according to the strength of touch, is differentiated from that of playing a chord. The result is authentic, natural acoustic piano resonance.

PX-850, AP-650M and AP-450 models offer 4 adjustment levels.

Achieving a more naturally beautiful resonance than a pedal

The deep, beautiful resonance resulting from the use of a damper pedal is also reproduced naturally by a stereo resonance simulator installed on all 88 keys, an approach that differs from conventional simulated reproduction effect processing. The attention to detail goes so far as to simulate the resonance created by the lifting of the dampers themselves when the pedal is pressed. A continuously variable system has been adopted for the damper pedal, meaning accurate reproduction of even subtle changes in reverberation caused by the delicate pressure exerted by partial pedal operation. This enables players to authentically employ pedal operation to achieve graceful and expressive performances.

When the lid on a grand piano is raised or lowered, the sound volume and quality of the acoustic changes. Casio’s new piano design incorporates a Lid Simulator* which reproduces the same acoustic effects for enhanced enjoyment with a digital piano. The acoustic effects of opening and closing the lid are simulated in fine detail, meaning that the nuances of piano sound you are seeking is always available as you play.

*PX-850, AP-650M and AP-450 only. Four stage lid simulator is operated via control panel. Open lid function provides enhanced acoustics.

The exceptionally replicated ebony and ivory keys offer the luxurious feel and texture as well as the smooth touch of a grand piano keyboard. The minutely detailed crimp surface finish inhibits finger slippage, often due to sweat by avoiding build-up and deposits within the grooves, leaving only the sensation of a perfect fingertip fit, even when playing for extended periods.

Tri-sensor Scaled Hammer Action Keyboard II

Tri-sensor Scaled Hammer Action Keyboard II means unique grand piano timing and sound.

The difference between the sound structures of a grand piano and a digital piano often centres upon the difference in timing. The new Tri-Sensor Scaled Hammer Action Keyboard II responds by incorporating a system with three sensors that detect keystrokes sequentially. This ensures meticulous variations in the detection time of a keystroke and sound production, as well as enabling a sound to be produced continuously, even when the key has not fully returned to its resting position, a feature assuring excellent playability when the same note is struck repeatedly.

Hammer Response

Hammer Response reproduces accurate sound timing balance among the key blocks.

The sizes of the hammers that strike the strings differ among the various key blocks in a grand piano. The sounding timing consequently varies subtly, even when keys are struck with the same strength. The new Casio piano keyboard system carefully reproduces these differences in sound production timing from one register to another. It even simulates the differences in sound production timing according to the force with whicha key is struck.

Key Off Simulator

Key Off Simulator* reproduces the tonal variations resulting from finger release.

The lengths of the reverberations and expressions a piano produces vary depending on the speed at which players release their fingers after touching the keys. The new keyboard system incorporates a Key Off Simulator that naturally reproduces these nuances resulting from key release. As a result, authentic reverberations that feel just like those of a grand piano are expressed.

* PX-850, AP-650M and AP-450 only