Viola in the context of Alto

An orchestra (/ˈɔːrkɪstrə/ ; OR-ki-strə) is a large instrumental ensemble typical of classical music, which combines instruments from different families. There are typically four main sections of instruments:

• The string section, including the violin, viola, cello, and double bass
• The woodwind section, including the flute, oboe, clarinet, bassoon, and occasionally saxophone
• The brass section, including the French horn (commonly known as the "horn"), trumpet, trombone, cornet, and tuba, and sometimes euphonium
• The percussion section, including the timpani, snare drum, bass drum, cymbals, triangle, tambourine, tam-tam and mallet percussion instruments

Other instruments such as the piano, harpsichord, pipe organ, and celesta may sometimes appear in a fifth keyboard section or may stand alone as soloist instruments, as may the concert harp and, for performances of some modern compositions, electronic instruments, and guitars.

The violin family of musical instruments was developed in Italy in the 16th century. At the time the name of this family of instruments was viole da braccio which was used to distinguish them from the viol family (viole da gamba). The standard modern violin family consists of the violin, viola, cello, and (possibly) double bass.

Instrument names in the violin family are all derived from the root viola, which is a derivative of the Medieval Latin word vitula (meaning "stringed instrument"). A violin is a "little viola", a violone is a "big viola" or a bass violin, and a violoncello (often abbreviated cello) is a "small violone" (or literally, a "small big viola"). (The violone is not part of the modern violin family; its place is taken by the modern double bass, an instrument with a mix of violin and viol characteristics.)

A five-string violin is a variant of violin with an extra string tuned below the violin's usual range. In addition to the G, D, A, and E strings of a standard violin, a five-string violin typically includes a lower C string. Violins with 6 or more strings may add a low F, low B♭, low E♭, or a soprano violin high A (sometimes a high B).

The five-string violin was created to combine the pitch ranges of the violin and viola. Bobby Hicks, a noted bluegrass fiddler, popularized the five-string violin in 1963, first showcasing his modification during a performance in Las Vegas. José Herrando wrote 6 Sonatas for the 5 string Violin (or 5 string Viola aka Grand Viola, or Viola Pomposa) and continuo. Due to the size limitations of a five-string violin, the low C string typically resonates with a slightly softer sound than the other strings. Five-string violas (aka Viola pomposa), normally tuned C, G, D, and A, and adding a high E string, have in the same tuning, but on a viola body and do not sound as squeaky. Capable players may be able to compensate for these shortcomings with technique, and electric instruments help these issues with the benefit of amplification. It is also possible for a luthier to create instruments that resolve the issue by adjusting the size of the instrument.

In music, a bow (/boʊ/) is a tensioned stick which has hair (usually horse-tail hair) coated in rosin (to facilitate friction) affixed to it. It is moved across some part (generally some type of strings) of a musical instrument to cause vibration, which the instrument emits as sound. The vast majority of bows are used with string instruments, such as the violin, viola, cello, and bass, although some bows are used with musical saws and other bowed idiophones.

A symphony is an extended musical composition in Western classical music, most often for orchestra. Although the term has had many meanings from its origins in the ancient Greek era, by the late 18th century the word had taken on the meaning common today: a work usually consisting of multiple distinct sections or movements, often four, with the first movement in sonata form. Symphonies are almost always scored for an orchestra consisting of a string section (violin, viola, cello, and double bass), brass, woodwind, and percussion instruments which altogether number about 30 to 100 musicians. Symphonies are notated in a musical score, which contains all the instrument parts. Orchestral musicians play from parts which contain just the notated music for their own instrument. Some symphonies also contain vocal parts (e.g., Beethoven's Ninth Symphony, or Mahler's Second Symphony).

The term string quartet is a type of musical composition or a group of four people who play them. Many composers from the mid-18th century onwards wrote string quartets. The associated musical ensemble consists of two violinists, a violist, and a cellist.

The string quartet was developed into its present form by the Austrian composer Joseph Haydn, whose works in the 1750s established the ensemble as a group of four more-or-less equal partners. Since that time, the string quartet has been considered a prestigious form; writing for four instruments with broadly similar characteristics both constrains and tests a composer. String quartet composition flourished in the Classical era, and Mozart, Beethoven and Schubert each wrote a number of them. Many Romantic and early-twentieth-century composers composed string quartets, including Mendelssohn, Schumann, Brahms, Dvořák, Janáček, and Debussy. There was a slight lull in string quartet composition later in the 19th century, but it received a resurgence in the 20th century, with the Second Viennese School, Bartók, Shostakovich, Babbitt, and Carter producing highly regarded examples of the genre, and it remains an important and refined musical form.

The violoncello (/ˌvaɪələnˈtʃɛloʊ/ VY-ə-lən-CHEL-oh, Italian pronunciation: [vjolonˈtʃɛllo]), commonly abbreviated as cello (/ˈtʃɛloʊ/ CHEL-oh), is a medium-low pitched bowed (sometimes plucked and occasionally hit) string instrument of the violin family. Its four strings are usually tuned in perfect fifths: from low to high, C₂, G₂, D₃ and A₃. The viola's four strings are each an octave higher. Music for the cello is generally written in the bass clef; the tenor clef and treble clef are used for higher-range passages.

Played by a cellist or violoncellist, it enjoys a large solo repertoire with and without accompaniment, as well as numerous concerti. As a solo instrument, the cello uses its whole range, from bass to soprano, and in chamber music, such as string quartets and the orchestra's string section, it often plays the bass part, where it may be reinforced an octave lower by the double basses. Figured bass music of the Baroque era typically assumes a cello, viola da gamba or bassoon as part of the basso continuo group alongside chordal instruments such as organ, harpsichord, lute, or theorbo. Cellos are found in many other ensembles, from modern Chinese orchestras to cello rock bands.

The string section of an orchestra is composed of bowed instruments belonging to the violin family. It normally consists of first and second violins, violas, cellos, and double basses. It is the most numerous group in the standard orchestra. In discussions of the instrumentation of a musical work, the phrase "the strings" or "and strings" is used to indicate a string section as just defined. An orchestra consisting solely of a string section is called a string orchestra. Smaller string sections are sometimes used in jazz, pop, and rock music and in the pit orchestras of musical theatre.

The viola pomposa (also known as the violino pomposo) is a five-stringed Viola developed around 1725. There are no exact dimensions applicable to all instruments used under this name, although in general the pomposa is slightly wider than a standard viola (hence the Italian adjective "pomposa"). It uses four viola strings, tuned conventionally (C-G-D-A), with the addition of a high E string (usually a violin string), giving it a greater range than the orchestral viola; the trade-off comes in a sound which is slightly more resonant than a violin. The viola pomposa is played on the arm and has a range from C3 to A6 (or even higher) with fingered notes. Using harmonics, the range can be extended to C8 depending on the quality of the strings.

The viola pomposa should not be confused with the viola da spalla, the violoncello, or the violoncello piccolo (read Paulinyi, 2012. In English: Paulinyi, 2010), although they did fulfill similar roles in Baroque ensembles. There is extensive debate about the origins of this instrument. Its invention is often attributed to Johann Sebastian Bach, as written about by several musicologists, such as Philipp Spitta (read Spitta, 1951). However, others such as Charles Sanford Terry and Dmitry Badiarov have argued that there is insufficient evidence to make that claim (read Terry, 1932 ), with Badiarov referring to Bach's invention of the viola pomposa as a myth. (Badiarov, 2007).

The Adagio and Rondo, K. 617, is a quintet composed by Wolfgang Amadeus Mozart for glass harmonica, flute, oboe, viola and cello. Completed on May 23, 1791 (the date indicated in Mozart's own list of his works), it was written for Marianne Kirchgessner, a blind glass harmonica virtuoso, who played the first performance in the Burgtheater Akademie on June 10, 1791, and subsequently performed it at the Kärtnertortheater on August 19, 1791.

The autograph manuscript is in the British Library as part of the Stefan Zweig Collection. It was purchased by Zweig from a Berlin auction house in 1930.

Sigiswald Kuijken (Dutch: [ˌsiɣɪsʋɑlt ˈkœykə(n)]; born 16 February 1944) is a Belgian violinist, violist, and conductor known for playing on period and original instruments.

Viola da braccio (from Italian "arm viola", plural viole da braccio) is a term variously applied during the baroque period to instruments of the violin family, in distinction to the viola da gamba ("leg viola") and the viol family to which the latter belongs. At first "da braccio" seems to encompass the entire violin family. Monteverdi's Orfeo (printed 1609) designates an entire six-part string section "viole da brazzo", apparently including bass instruments held between the knees like the cello and bass violin. His Selva morale (1641) contains a piece calling for "due violini & 3 viole da brazzo ouero 3 Tronboni" (2 violins & 3 viole da braccio or trombones), reflecting a general shift in meaning towards the lower instruments. Eventually it came to be reserved for the alto member, the viola. A famous example is Bach's Sixth Brandenburg Concerto (1721), combining two viole da braccio with two viole da gamba. The German word for viola, Bratsche, is a relic of this last use.

The cythara is a wide group of stringed instruments of medieval and Renaissance Europe, including not only the lyre and harp but also necked, string instruments. In fact, unless a medieval document gives an indication that it meant a necked instrument, then it likely was referring to a lyre. It was also spelled cithara or kithara and was Latin for the Greek lyre. However, lacking names for some stringed instruments from the medieval period, these have been referred to as fiddles and citharas/cytharas, both by medieval people and by modern researchers. The instruments are important as being ancestors to or influential in the development of a wide variety of European instruments, including fiddles, vielles, violas, citoles and guitars. Although not proven to be completely separate from the line of lute-family instruments that dominated Europe (lute, oud, gittern, mandore), arguments have been made that they represent a European-based tradition of instrument building, which was for a time separate from the lute-family instruments.

In the 9th century, one of the instruments that cythara was actively used to name was a large plucked or strummed instrument; pictures show it being played with a plectrum. Pictures of the instrument illustrated in the Stuttgart Psalter all have the word "cythara" near the instrument in the text. The players hold the instrument in a distinct manner similar to the way that citole players were shown to hold their instruments, resting the instrument on the playing arm, and bringing their forearm and wrist to the strings from underneath the body of the instrument. In contrast, players of lute family instruments, such as the gittern, mandore, or lute did not hold the instrument this way. Instead of keeping their arms below the instrument, they allowed their arm and wrist to move parallel to the soundboard, as a guitar player does today.

Don Quixote, Op. 35 is a tone poem by Richard Strauss for cello, viola, and orchestra. Subtitled Phantastische Variationen über ein Thema ritterlichen Charakters (Fantastic Variations on a Theme of Knightly Character), the work is based on the novel Don Quixote de la Mancha by Miguel de Cervantes. Strauss composed this work in Munich in 1897. The premiere took place in Cologne on 8 March 1898, with Friedrich Grützmacher as the cello soloist and Franz Wüllner as the conductor.

The score is 45 minutes long and is written in theme and variations form, with the solo cello representing Don Quixote, and the solo viola, tenor tuba, and bass clarinet depicting his squire Sancho Panza. The second variation depicts an episode where Don Quixote encounters a herd of sheep and perceives them as an approaching army. Strauss uses dissonant flutter-tonguing in the brass to emulate the bleating of the sheep, an early instance of this extended technique. Strauss later quoted this passage in his music for Le bourgeois gentilhomme, at the moment a servant announces the dish of "leg of mutton in the Italian style". Graham Phipps has examined the structure of the work in terms of Arnold Schoenberg's ideas of 'surface harmonic logic' and 'developing variation'.

Metamorphosen, study for 23 solo strings (TrV 290, AV 142) is a composition by Richard Strauss for ten violins, five violas, five cellos, and three double basses, typically lasting 25 to 30 minutes. It was composed during the closing months of the Second World War, from August 1944 to March 1945. The piece was commissioned by Paul Sacher, the founder and director of the Basler Kammerorchester and Collegium Musicum Zürich, to whom Strauss dedicated it. It was first performed on 25 January 1946 by Sacher and the Collegium Musicum Zürich, with Strauss conducting the final rehearsal.

Alessandro Rolla (Italian pronunciation: [alesˈsandro ˈrɔlla]; 23 April 1757 – 14 September 1841) was an Italian viola and violin virtuoso, composer, conductor and teacher. His son, Antonio Rolla, was also a violin virtuoso and composer.

His fame now rests mainly as "teacher of the great Paganini", yet his role was very important in the development of violin and viola technique. Some of the technical innovations that Paganini later utilized largely, such as left-hand pizzicato, chromatic ascending and descending scales, the use of very high positions on violin and viola, octave passages, were first introduced by Rolla.