The Piano
A keyboard instrument with hammers striking strings, invented by Cristofori.
Unknown author · Public domain
The piano is a keyboard instrument that works when a player presses its keys, triggering a mechanism where felt-covered wooden hammers strike strings. Most modern pianos have 88 black and white keys, though the Bosendörfer and Stuart & Sons models are exceptions. These keys are tuned to a chromatic scale using equal temperament. A musician who plays the piano is called a pianist.
There are two main types: the grand piano and the upright piano. Grand pianos produce better sound and offer more precise key control, making them the top choice when space and money allow. They are also considered essential in venues where skilled pianists perform. Upright pianos are more common because they are smaller and cheaper.
When a key is pressed, the hammers hit the strings. The vibrations travel through a bridge to a soundboard, which amplifies the sound by coupling the acoustic energy to the air. Releasing the key causes a damper to stop the string’s vibration, ending the note. Most notes have three strings, except for the bass notes, which have one or two. Pedals at the base of the instrument can sustain notes by lifting the dampers off the strings, allowing pianists to connect and overlay sounds for expressive, colorful sonority.
In the 19th century, influenced by Romantic music, the fortepiano evolved. A cast iron frame was introduced, allowing much greater string tensions. Aliquot stringing gave grand pianos a more powerful sound, longer sustain, and richer tone. As the piano became more common later in the century, families could hear newly published pieces by having a member play a simplified version.
The piano is widely used in classical, jazz, traditional, and popular music for solo and ensemble performances, accompaniment, composing, songwriting, and rehearsals. Despite its weight and cost, its versatility, the extensive training of musicians, and its availability in venues, schools, and rehearsal spaces have made it a familiar instrument in the Western world.
**History**
The piano built on earlier innovations in struck-string and keyboard instruments. The earliest known keyboard instrument was the Ancient Greek hydraulis, a type of pipe organ invented in the third century BC. Pipe organs continued in use in Europe through the Middle Ages, teaching builders about keyboard mechanisms for sounding pitches. The first string instruments with struck strings were hammered dulcimers, which came from the Middle East and reached Europe in the Middle Ages. During that period, there were several attempts to create stringed keyboard instruments with struck strings. By the 17th century, the mechanisms of the clavichord and harpsichord were well developed. In a clavichord, strings are struck by tangents; in a harpsichord, they are plucked by quills when the key is pressed. Centuries of work on the harpsichord showed builders the best ways to construct the case, soundboard, bridge, and mechanical action for a keyboard meant to sound strings.
The English word *piano* is short for the Italian *pianoforte*, which comes from *gravecembalo col piano e forte* (“harpsichord with soft and loud”). Volume changes come from the pianist’s touch: pressing harder makes the hammer hit the strings with more force, producing a louder sound and stronger attack. Invented in 1700, the fortepiano was the second keyboard instrument (after the clavichord) to allow gradations of volume and tone based on how forcefully or softly the player presses the keys, unlike the pipe organ and harpsichord.
**Invention**
The invention of the piano is credited to Bartolomeo Cristofori of Padua, Italy, who worked for Ferdinando de’ Medici, Grand Prince of Tuscany, as Keeper of the Instruments. Cristofori was an expert harpsichord maker familiar with the body of knowledge on stringed keyboard instruments. This knowledge helped him develop the first pianos. It is not known when he built the first one, but an inventory by the Medici family shows a piano existed by 1700. The three surviving Cristofori pianos date from the 1720s. Cristofori named the instrument *un cimbalo di cipresso di piano e forte* (“a keyboard of cypress with soft and loud”), later shortened to *pianoforte*, *fortepiano*, and finally *piano*.
Cristofori’s great success was designing a stringed keyboard instrument where notes are struck by a hammer. The hammer must strike the string but not stay in contact, because continued contact would damp the sound and stop the vibration. So after striking, the hammer must quickly rebound from the strings. It must return to its rest position without bouncing violently, to prevent accidental re-playing of notes. It must also be ready to play again almost immediately after the key is depressed, allowing the player to repeat the same note rapidly. Cristofori’s piano action became a model for many approaches that followed in the next century.
His early instruments used thin strings and were much quieter than the modern piano, though they were louder and had more sustain than the clavichord—the only previous keyboard instrument capable of dynamic nuance responding to touch.
- inventor
- Bartolomeo Cristofori
- place_of_origin
- Padua, Italy
- type
- Keyboard instrument
- key_count
- 88 (except Bosendörfer and Stuart & Sons)
- main_types
- Grand piano and upright piano
Lore & Background
The piano was based on earlier technological innovations in struck-string instruments and keyboard instruments. The earliest known keyboard instrument was the Ancient Greek hydraulis, a type of pipe organ invented in the third century BC. The first string instruments with struck strings were the hammered dulcimers, which originated in the Middle East and were introduced in Europe in the Middle Ages. By the 17th century, the mechanisms of keyboard instruments such as the clavichord and the harpsichord were well developed. Cristofori, an expert harpsichord maker, designed a stringed keyboard instrument in which the notes are struck by a hammer that must rebound quickly to avoid damping the sound.
Reader's Guide
The piano's significance lies in its ability to produce variations in volume in response to the pianist's touch, unlike the pipe organ and harpsichord. It combines the loudness of the harpsichord with the dynamic control of the clavichord. In the 19th century, influenced by Romantic music trends, the fortepiano underwent changes such as the use of a cast iron frame, which allowed much greater string tensions, and aliquot stringing gave grand pianos a more powerful sound, a longer sustain, and a richer tone. The piano became more common, allowing families to listen to newly published musical pieces by having a family member play a simplified version. Despite its weight and cost, the piano's versatility, the extensive training of musicians, and its availability in venues, schools, and rehearsal spaces have made it a familiar instrument in the Western world. The grand piano offers better sound and more precise key control, while the upright piano is more commonly used due to its smaller size and lower cost.
Did You Know?
- The English word piano is a shortened form of the Italian pianoforte, derived from 'gravecembalo col piano e forte' (harpsichord with soft and loud).
- Cristofori's early instruments were made with thin strings and were much quieter than the modern piano.
- Most notes have three strings, except for the bass, which graduates from one to two.
The Keyboard Family's Rich Tapestry
The keyboard category in this instrument catalog reveals a far broader world than most listeners imagine. Beyond the familiar piano, the list encompasses a remarkable spectrum of keyboard-based instruments spanning multiple continents and centuries. Accordion variants appear in several distinct forms—chromatic button, diatonic button, free bass, and the Austrian Schrammel and Steirische Harmonika types—each representing different regional playing traditions. The Hammond organ and electronic organ stand alongside the reed organ, while the Indian harmonium brings a South Asian voice into the collection. Historical instruments like the virginals, claviorgan, and claviharp connect modern players to earlier keyboard traditions. The square piano and honky-tonk piano represent specific American musical contexts, while the minipiano and player piano showcase mechanical and compact innovations. The orchestron and physharmonica add further layers, demonstrating that the keyboard family is far from a single, unified lineage.
Glass, Water, and Unconventional Percussion
The 'other percussion instruments' section of this catalog is a fascinating collection of entries that defy conventional expectations of what percussion can be. Glass-based instruments dominate the list, including the glass harmonica, glass harp, and glasschord, each producing sound through the vibration of glass surfaces. Water plays a central role in several entries: the hydraulophone, sea organ, and the Japanese suikinkutsu all harness flowing water to create tonal effects. The list also includes the waterphone, sênh tiền, silnyen, tetzilacatl, and toka, suggesting a widespread global tradition of using liquid or glass for melodic percussion. More unusual entries like the pyrophone, plasmaphone, and quintephone push the boundaries of what materials can produce structured sound. The shishi-odoshi from Japan and the monkey stick add playful, mechanical elements, while the jhyamta, khmuoh, kong chmol, and lau represent instruments tied to specific cultural traditions documented in this reference.
A Classification Framework for Sound
The structure of this instrument list follows the Hornbostel-Sachs classification system, which organizes all musical instruments into fundamental categories based on their primary sound-producing mechanism. The top-level divisions visible here include idiophones, membranophones, aerophones, chordophones, and electrophones. This taxonomic approach means that a piano and a glass harmonica, though both capable of producing melodic lines, are classified in entirely different families. The 'see also' section further contextualizes the list by pointing readers toward medieval instruments, fictional instruments, folk music traditions, and the full Hornbostel-Sachs numbering system. This framework transforms what might appear to be a simple catalog into a window into how ethnomusicologists conceptualize the relationships between instruments across cultures, centuries, and technological eras.
Global and Historical Reach
The breadth of this instrument catalog reflects the extraordinary diversity of human musical invention across time and geography. Japanese contributions include the suikinkutsu water zither, the shishi-odoshi, and the yunluo, while the Indian harmonium anchors South Asian representation in the keyboard section. The presence of instruments like the jhyamta, khmuoh, kong chmol, and lau suggests documentation of instruments from specific cultural traditions that might otherwise remain obscure to a general audience. The 'see also' references to medieval musical instruments and folk music traditions indicate that this list is part of a larger scholarly effort to preserve knowledge of instruments spanning many centuries. The inclusion of both ancient forms such as the virginals and claviorgan alongside modern electronic instruments like the electronic keyboard and electronic organ demonstrates how the keyboard tradition stretches from the early modern period into the digital age, encompassing everything from the square piano to the Hammond organ.
Common Misconceptions (Editorial)
One common misconception is that the piano was invented in the 18th century by a single person, which is true—Bartolomeo Cristofori is indeed credited as its inventor. Another is that the piano’s full name, “pianoforte,” refers simply to its ability to play both soft and loud, which is accurate, as the term originally comes from the Italian for “harpsichord with soft and loud.” No fact-supported misconceptions can be corrected here, as the provided facts align with common understanding.
Why It Matters (Editorial)
The piano endures as a cornerstone of Western and global music because it uniquely combines percussive force with lyrical expressiveness, allowing a single player to command both melody and harmony. Its versatility—from classical concertos to jazz improvisation and pop songwriting—ensures it remains an essential tool for composition, performance, and education across virtually every musical tradition.
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Frequently Asked Questions
How does The Piano actually produce sound?
Pressing a key triggers an internal action mechanism that swings a small hammer into a set of strings. The resulting vibration of those strings is what generates the audible tone.
How many keys does The Piano have?
A standard modern piano features 88 keys, though a few makers such as Bosendörfer and Stuart & Sons build models with extra keys beyond that count.
What are the main types of The Piano?
The two primary forms are the grand piano, which lays its string bed horizontally, and the upright piano, which stacks its strings vertically. Both rely on the same fundamental hammer-and-string mechanism.
Why is The Piano so important in music?
It serves as a central instrument across classical, jazz, traditional, and popular genres, used for solo performance, ensemble playing, accompaniment, and as a primary tool for composing and rehearsals. Its wide dynamic range and full chromatic capability make it uniquely versatile.
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