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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.
English: Upright piano mechanism - english type. Français : ... English: Upright piano action. Pin block (1) Tuning pin (2) Agraffe (3) Mechanical support (4)
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 ...
A Papps mute performs the same function in an upright piano and is placed through the piano action to mute either the 2 left strings (of a trichord), or the 2 right strings similarly. After the center strings are all tuned (or right if a Papps mute is used) the felt strip can be removed note by note, tuning the outer strings to the center strings.
On the modern upright piano, the left pedal is not truly an una corda, because it does not shift the action sideways. The strings run at such an oblique angle to the hammers that if the action moved sideways, the hammer might strike one string of the wrong note. [7] A more accurate term for the left pedal on an upright piano is the half-blow pedal.
The Cristofori piano action. The complexity of Cristofori's action and hence the difficulty of building it may have formed a barrier to later builders, who appear to have tried to simplify it. However, Cristofori's design ultimately won out; the standard modern piano action is a still more complex and evolved version of Cristofori's original.
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Values in bold are exact on an idealized standard piano. Keys shaded gray are rare and only appear on extended pianos. The normal 88 keys were numbered 1–88, with the extra low keys numbered 89–97 and the extra high keys numbered 98–108. A 108-key piano that extends from C 0 to B 8 was first built in 2018 by Stuart & Sons. [4]
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