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A tuning wrench (also called a tuning lever or tuning hammer) is a specialized socket wrench used to tune string instruments, such as the piano, harp, and hammer dulcimer, that have strings wrapped around tuning pins. Other string instruments do not require a tuning wrench because their tuning pins or pegs come with handles (as with the violin ...
A piano tuner's most basic tools include the tuning lever (or "hammer") and mutes An illustration of beating. The sum (blue) of two waves (red, green) is shown as one of the waves increases in frequency. The two waves are initially identical, then the frequency of the green wave is gradually increased by 25%.
In a typical hammer action keybed for a digital piano, as the key (1) is depressed, a cam (4) underneath the key presses on one end of a hammer (5), lifting the hammer weight (6) on the other end. The sensor(s) (7) in this case are placed to detect the motion of the hammer; sensors may be placed to detect key and/or hammer position, force, and ...
A piano tuner at work Voicing needle for softening hammers. The felt hammers of the piano tend to harden over time, as the felt becomes compressed by repeated impact. They also form grooves at the points of contact with the strings. Harder hammers produce a brighter tone quality, which may ultimately become harsh and undesirable.
Piano actions are complex mechanical devices which impose very specific design requirements, virtually all of which were met by Cristofori's action. First, a piano action must be arranged so that a key press does not actually lift the hammer all the way to the string. If it did, the hammer would block on the string and damp its vibrations.
The Rhodes piano (also known as the Fender Rhodes piano) is an electric piano invented by Harold Rhodes, which became popular in the 1970s.Like a conventional piano, the Rhodes generates sound with keys and hammers, but instead of strings, the hammers strike thin metal tines, which vibrate next to an electromagnetic pickup.
A tack piano (also known as a harpsipiano, jangle piano, and junk piano) is an altered version of an ordinary piano, in which objects such as thumbtacks or nails are placed on the felt-padded hammers of the instrument at the point where the hammers hit the strings, giving the instrument a tinny, more percussive sound. It is used to evoke the ...
A knee lever moved the action farther than the action-shift pedal, making the hammers strike only one string. Other Érard piano patents deal mainly with technicalities of the keyboard action, soundboard, and tuning mechanism; virtually all of these innovations are retained in modern piano design.
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