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  2. Piano key frequencies - Wikipedia

    en.wikipedia.org/wiki/Piano_key_frequencies

    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. Piano - Wikipedia

    en.wikipedia.org/wiki/Piano

    Piano Grand piano Upright piano Keyboard instrument Hornbostel–Sachs classification 314.122-4-8 (Simple chordophone with keyboard sounded by hammers) Inventor(s) Bartolomeo Cristofori Developed Early 18th century Playing range The Well-Tempered Clavier, first prelude of Book I Played by Kimiko Douglass-Ishizaka Problems playing this file? See media help. A piano is a keyboard instrument that ...

  4. Action (piano) - Wikipedia

    en.wikipedia.org/wiki/Action_(piano)

    The piano action mechanism [1] (also known as the key action mechanism [2] or simply the action) of a piano or other musical keyboard is the mechanical assembly which translates the depression of the keys into rapid motion of a hammer, which creates sound by striking the strings.

  5. Musical keyboard - Wikipedia

    en.wikipedia.org/wiki/Musical_keyboard

    A musical keyboard is the set of adjacent depressible levers or keys on a musical instrument. Keyboards typically contain keys for playing the twelve notes of the Western musical scale, with a combination of larger, longer keys and smaller, shorter keys that repeats at the interval of an octave.

  6. Imperial Bösendorfer - Wikipedia

    en.wikipedia.org/wiki/Imperial_Bösendorfer

    For 90 years it was the only concert grand piano in the world with 97 keys, [3] until it was joined in 1990 by the instruments of Stuart & Sons of Australia. Music critic Melinda Bargreen has described the Imperial as the ne plus ultra of pianos, while pianist Garrick Ohlsson dubbed it the "Rolls-Royce of pianos". [1] [3] [4]

  7. Bösendorfer - Wikipedia

    en.wikipedia.org/wiki/Bösendorfer

    Bösendorfer pioneered the extension of the typical 88-key keyboard, creating the Imperial Grand (Model 290), which has 97 keys (eight octaves). Ferruccio Busoni initially ordered this innovation in 1909 as part of a custom piano, as he wanted to transcribe an organ piece that extended to the C below the standard keyboard. [ 8 ]

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