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A keyboard instrument is a musical instrument played using a keyboard, a row of levers which are pressed by the fingers. The most common of these are the piano , organ , and various electronic keyboards , including synthesizers and digital pianos .
Manufacturers of electronic keyboards, synthesizers, and digital pianos have used various designs to recreate the feel of an acoustic piano. The simplest electronic keyboards, sometimes known as synth-action, use springs to restore each key to its resting position, similar in concept to a computer keyboard, but providing the least realism. [9]
Diagram of beat frequency. In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies. With tuning instruments that can produce sustained tones
A child playing a Casio keyboard with small-size minikeys. Minikeys: Most electronic keyboards have keys that are similar to the size of keys on an acoustic piano. Some electronic keyboards have minikeys, either because they are targeted at child users or to make the instrument smaller and more portable.
The keyboard's touch and action is designed to be like an acoustic piano. Pressing a key results in a hammer striking a thin metal rod called a tine connected to a larger "tone bar". The tone generator assembly acts as a tuning fork as the tone bar reinforces and extends the tine's vibrations.
Pressing a key on the keyboard makes the instrument produce sounds—either by mechanically striking a string or tine (acoustic and electric piano, clavichord), plucking a string (harpsichord), causing air to flow through a pipe organ, striking a bell , or activating an electronic circuit (synthesizer, digital piano, electronic keyboard).
Similar to a traditional acoustic piano, the defining feature of a digital piano is a musical keyboard with 88 keys. The keys are weighted to simulate the action of an acoustic piano and are velocity-sensitive so that the volume and timbre of a played note depends on how hard the key is pressed.
Robert Moog, inventor of the Moog synthesizer. An electronic musical instrument or electrophone is a musical instrument that produces sound using electronic circuitry.Such an instrument sounds by outputting an electrical, electronic or digital audio signal that ultimately is plugged into a power amplifier which drives a loudspeaker, creating the sound heard by the performer and listener.