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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.
There are two broad types of pedal pianos: either the pedal board may be an integral part of the instrument, using the same strings and mechanism as the manual keyboard (e.g. the 19th century Érard pedal grand piano and Pleyel upright pedal piano), or [4] it may consist of two independent pianos (each with its separate mechanics and strings ...
On most upright pianos, the soft pedal operates a mechanism that moves the hammers' resting position closer to the strings.Since the hammers have less distance to travel this reduces the speed at which they hit the strings, and hence the volume is reduced, but this does not change tone quality in the way the una corda pedal does on a grand piano.
The sostenuto pedal is a similar device that sustains only notes that are depressed at the time the pedal is depressed. It is usually the middle of three pedals; but in some upright pianos the middle pedal instead lowers a veil of felt between the hammers and the strings to function as a mute.
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 ...
Acoustic pianos have expression pedals that change the response or tone of the instrument. On small upright pianos, the soft pedal (also called una corda or half-blow pedal) moves the hammers closer to the strings. On grand pianos, the soft pedal moves the hammers sideways so each hammer strikes only part of its string group.