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This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [1] [2] Every octave is made of twelve steps called semitones.
[3] [4] [5] Melodica keyboards typically ascend from a low F note. Keyboards often have 32 or 37 keys, though instruments may have as few as 13 or as many as 45 keys. Larger models include the Hammond Pro 44 or the Ballone Burini Eolina P45, with 44 and 45 keys respectively. [6]
Schoenhut 37-key Concert Grand (F3 to F6) Child playing Keyskills 30-key toy piano (C4 to F6) The toy piano, also known as the kinderklavier (lit. ' children's piano ' in German), is a small piano-like musical instrument. Most modern toy pianos use round metal rods, as opposed to strings in a regular piano, to produce sound.
Magna Organ introduced in 1935, [7] [8] was a multi-timbral keyboard instrument invented in 1934 by a Yamaha engineer, Sei-ichi Yamashita. It was a kind of electro-acoustic instrument, an acoustic instrument with additional electronic circuits for sound modification.
The original Casiotone line was abbreviated to CT in the mid-1980s but has continued to feature full-sized keys. MT and PT lines typically feature mini keys and the VL line features push-button keys. Most Casio keyboards feature automated accompaniment sections which may include drums, bass, chords and harmonies.
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).