Keyboard Pianists
The piano is a musical instrument played by means of a keyboard. Widely used in Western music for solo performance, ensemble use, chamber music, and accompaniment, the piano is also very popular as an aid to composing and rehearsal. Although not portable and often expensive, the piano's versatility and ubiquity have made it one of the most familiar musical instruments.
The piano is founded on earlier technological innovations. During the Middle Ages, there were several attempts at creating stringed keyboard instruments with struck strings, the earliest being the hurdy gurdy which has uncertain origins. By the 17th century, the mechanisms of keyboard instruments such as the clavichord and the harpsichord were well known. In a clavichord the strings are struck by tangents, while in a harpsichord they are plucked by quills. Centuries of work on the mechanism of the harpsichord in particular had shown the most effective ways to construct the case, soundboard, bridge, and keyboard.
In the period lasting from about 1790 to 1860, the Mozart-era piano underwent tremendous changes that led to the modern form of the instrument. This revolution was in response to a consistent preference by composers and pianists for a more powerful, sustained piano sound, and made possible by the ongoing Industrial Revolution with technological resources such as high-quality steel, called piano wire, for strings, and precision casting for the production of iron frames. Over time, the tonal range of the piano was also increased from the five octaves of Mozart's day to the 7¼ or more octaves found on modern pianos.
Early technological progress owed much to the English firm of Broadwood, who already had a reputation for the splendour and powerful tone of its harpsichords. Broadwood constructed instruments that were progressively larger, louder, and more robustly constructed. They sent pianos to both Joseph Haydn and Ludwig van Beethoven, and were the first firm to build pianos with a range of more than five octaves: five octaves and a fifth during the 1790s, six octaves by 1810 (Beethoven used the extra notes in his later works), and seven octaves by 1820. The Viennese makers similarly followed these trends, however the two schools used different piano actions: Broadwoods were more robust, Viennese instruments were more sensitive.
One of the major technical innovations that helped to create the sound of the modern piano was the use of a strong iron frame. Also called the "plate", the iron frame sits atop the soundboard, and serves as the primary bulwark against the force of string tension. The increased structural integrity of the iron frame allowed the use of thicker, tenser, and more numerous strings. In a modern grand the total string tension can exceed 20 tons. The single piece cast iron frame was patented in 1825 in Boston by Alpheus Babcock, combining the metal hitch pin plate and resisting bars. Babcock later worked for the Chickering & Mackays firm who patented the first full iron frame for grand pianos in 1843. Composite forged metal frames were preferred by many European makers until the American system was fully adopted by the early 20th century.
Modern pianos come in two basic configurations: the grand piano and the upright piano. In grand pianos, the frame and strings are horizontal, with the strings extending away from the keyboard. There are several sizes of grand piano. A rough generalization distinguishes the "concert grand" (between about 2.2 m and 3 m long) from the "parlor grand" or "boudoir grand" (about 1.7 m to 2.2 m) and the smaller "baby grand".
Pianos with shorter, thicker, and stiffer strings (e.g., baby grands) have more inharmonicity. The longer strings on a concert grand can vibrate more freely than the shorter, thicker strings on a baby grand, which means that a concert grand's strings will have truer overtones. This allows the strings to be tuned closer to equal temperament in relation to the standard pitch with less "stretching" in the piano tuning (See: Piano tuning). Full-size grands are usually used for public concerts, whereas smaller grands, introduced by Sohmer & Co. in 1884, are often chosen for domestic use where space and cost are considerations.
A grand piano action has a repetition lever for each key. If the key is pressed repeatedly and fairly quickly this repetition lever catches the hammer close to the strings, which assists the speed and control of repeated notes and trills.
Upright pianos, also called vertical pianos, are more compact because the frame and strings are vertical. The hammers move horizontally, and are returned to their resting position by springs which are prone to wear and tear. Upright pianos with unusually tall frames and long strings are sometimes called "upright grand" pianos.
Some authors classify modern pianos according to their height and, to modifications of the action that are necessary to accommodate the height. Almost every modern piano has 36 black keys and 52 white keys for a total of 88 keys.
Pianos have had pedals, or some close equivalent, since the earliest days. (In the 18th century, some pianos used levers pressed upward by the player's knee instead of pedals.) Most grand pianos have three pedals: the soft pedal (una corda), sostenuto, and sustain pedal (from left to right, respectively). Most modern upright pianos have three pedals: soft pedal, practice pedal and sustain pedal, though older or cheaper models may lack the practice pedal.
The sustain pedal (or, damper pedal) is often simply called "the pedal", since it is the most frequently used. It is placed as the rightmost pedal in the group. It lifts the dampers from all keys, sustaining all played notes, and altering the overall tone.