A string orchestra is an orchestra consisting solely of a string section made up of the bowed strings used in Western Classical music. The instruments of such an orchestra are most often the following: the violin, which is divided into first and second violin players (each usually playing different parts), the viola, the cello, and usually, but not always, the double bass. String orchestras can be of chamber orchestra size ranging from between 12 (4 first violins, 3 second violins, 2 violas, 2 cellos and 1 bass = 12) and 21 musicians (6 first violins, 5 second violins, 4 violas, 4 cellos and 2 double basses= 21) sometimes performing without a conductor. It could also consist of the entire string section of a large symphony orchestra which could have 60 musicians (16 first violins, 14 second violins, 12 violas, 10 cellos and 8 double basses = 60; Gurre-Lieder calls for 84: 20.20.16.16.12).

Michael Tippett's Concerto for Double String Orchestra (1938–39) is one of his most popular and frequently performed works.

Fantasia Concertante on a Theme of Corelli, also known as the Corelli Fantasia, is a work for string orchestra by the British composer Michael Tippett. It was commissioned by the 1953 Edinburgh Festival to commemorate the 300th anniversary of the birth of the Italian composer Arcangelo Corelli, and given its first performance on 29 August 1953, in the Usher Hall, by the BBC Symphony Orchestra conducted by Tippett. Integrating 17th century influences, especially those outside of the orchestral tradition, can be traced back to the composer's days at the Royal College of Music, and to the period immediately after when he took a position conducting amateur choirs in Oxted. Meanwhile his interest in 18th century counterpoint, specifically the fugal process, which would figure prominently and climactically in the latter part of the Fantasia, was the result of his supplementary studies with R. O. Morris, also dating from that period. The Fantasia represents, stylistically and conceptually, Tippett’s most ambitious attempt to create a synthetic composition that anticipates the creative developments that eventually led to the formation of his notional archetype.

Sir Michael Kemp Tippett (2 January 1905 – 8 January 1998) was an English composer who rose to prominence during and immediately after the Second World War. In his lifetime he was sometimes ranked with his contemporary Benjamin Britten as one of the leading British composers of the 20th century. Among his best-known works are the oratorio A Child of Our Time, the orchestral Fantasia Concertante on a Theme of Corelli, and the opera The Midsummer Marriage. Tippett's talent developed slowly. He withdrew or destroyed his earliest compositions, and was 30 before any of his works were published. Until the mid-to-late 1950s his music was broadly lyrical in character, before changing to a more astringent and experimental style. New influences—including those of jazz and blues after his first visit to America in 1965—became increasingly evident in his compositions. While Tippett's stature with the public continued to grow, not all critics approved of these changes in style, some believing that the quality of his work suffered as a consequence. From around 1976 his late works began to reflect the works of his youth through a return to lyricism. Although he was much honoured in his lifetime, critical judgement on Tippett's legacy has been uneven, the greatest praise generally reserved for his earlier works. His centenary in 2005 was a muted affair; apart from the few best-known works, his music has not been performed frequently in the 21st century. Having briefly embraced communism in the 1930s, Tippett avoided identifying with any political party. A pacifist after 1940, he was imprisoned in 1943 for refusing to carry out war-related duties required by his military exemption. His initial difficulties in accepting his homosexuality led him in 1939 to Jungian psychoanalysis; the Jungian dichotomy of "shadow" and "light" remained a recurring factor in his music. He was a strong advocate of music education, and was active for much of his life as a radio broadcaster and writer on music.

Sir Michael Kemp Tippett (2 January 1905 – 8 January 1998) was an English composer who rose to prominence during and immediately after the Second World War. In his lifetime he was sometimes ranked with his contemporary Benjamin Britten as one of the leading British composers of the 20th century. Among his best-known works are the oratorio A Child of Our Time, the orchestral Fantasia Concertante on a Theme of Corelli, and the opera The Midsummer Marriage. Tippett's talent developed slowly. He withdrew or destroyed his earliest compositions, and was 30 before any of his works were published. Until the mid-to-late 1950s his music was broadly lyrical in character, before changing to a more astringent and experimental style. New influences—including those of jazz and blues after his first visit to America in 1965—became increasingly evident in his compositions. While Tippett's stature with the public continued to grow, not all critics approved of these changes in style, some believing that the quality of his work suffered as a consequence. From around 1976 his late works began to reflect the works of his youth through a return to lyricism. Although he was much honoured in his lifetime, critical judgement on Tippett's legacy has been uneven, the greatest praise generally reserved for his earlier works. His centenary in 2005 was a muted affair; apart from the few best-known works, his music has not been performed frequently in the 21st century. Having briefly embraced communism in the 1930s, Tippett avoided identifying with any political party. A pacifist after 1940, he was imprisoned in 1943 for refusing to carry out war-related duties required by his military exemption. His initial difficulties in accepting his homosexuality led him in 1939 to Jungian psychoanalysis; the Jungian dichotomy of "shadow" and "light" remained a recurring factor in his music. He was a strong advocate of music education, and was active for much of his life as a radio broadcaster and writer on music.

Sir Michael Kemp Tippett (2 January 1905 – 8 January 1998) was an English composer who rose to prominence during and immediately after the Second World War. In his lifetime he was sometimes ranked with his contemporary Benjamin Britten as one of the leading British composers of the 20th century. Among his best-known works are the oratorio A Child of Our Time, the orchestral Fantasia Concertante on a Theme of Corelli, and the opera The Midsummer Marriage. Tippett's talent developed slowly. He withdrew or destroyed his earliest compositions, and was 30 before any of his works were published. Until the mid-to-late 1950s his music was broadly lyrical in character, before changing to a more astringent and experimental style. New influences—including those of jazz and blues after his first visit to America in 1965—became increasingly evident in his compositions. While Tippett's stature with the public continued to grow, not all critics approved of these changes in style, some believing that the quality of his work suffered as a consequence. From around 1976 his late works began to reflect the works of his youth through a return to lyricism. Although he was much honoured in his lifetime, critical judgement on Tippett's legacy has been uneven, the greatest praise generally reserved for his earlier works. His centenary in 2005 was a muted affair; apart from the few best-known works, his music has not been performed frequently in the 21st century. Having briefly embraced communism in the 1930s, Tippett avoided identifying with any political party. A pacifist after 1940, he was imprisoned in 1943 for refusing to carry out war-related duties required by his military exemption. His initial difficulties in accepting his homosexuality led him in 1939 to Jungian psychoanalysis; the Jungian dichotomy of "shadow" and "light" remained a recurring factor in his music. He was a strong advocate of music education, and was active for much of his life as a radio broadcaster and writer on music.

British composer Michael Tippett composed his Concerto for Piano and Orchestra between 1953 and 1955 on a commission from the City of Birmingham Symphony Orchestra. The overall character of the work was influenced by the composer's hearing German pianist Walter Gieseking rehearse Ludwig van Beethoven's Fourth Piano Concerto in 1950. Its musical content, while influenced by this concerto, was also shaped largely by Tippett's opera The Midsummer Marriage, which he had completed in 1952. While Tippett had conceived the work initially in the mid-1940s, he had been preoccupied in much of the intervening time with The Midsummer Marriage. The Piano Concerto was the result of one of Tippett's most complex creative cycles. The events that initiated the cycle contributed to its conceptual dimensions and date back to January 1950 when he was deep into the compositional process for The Midsummer Marriage. Echoes of the opera resonate throughout Concerto while two other previous compositions: the Fantasia on a Theme of Handel (1939–41) and the First Symphony (1944-5) figure prominently in the creative cycle as well. The Concerto was originally intended for Noel Mewton-Wood, who had assisted Tippett in playing back portions of the piano reduction of The Midsummer Marriage that were meticulously prepared by Michael Tillett, but Mewton-Wood killed himself on 5 December 1953. Further controversy over the concerto erupted when the soloist, Julius Katchen, declared the work unplayable and walked out shortly before its premiere in 1956. Katchen was replaced by Louis Kentner. With its emphasis on lyricism and poetry rather than high drama and virtuosic display, the Tippett piano concerto has been seen by British composer David Matthews as both commentary on and reaction against the percussive and heroic aspects that had predominated concerto writing in the decades preceding it. This approach was fully in keeping with the composer's stated disdain for what he considered a confrontational rather than collaborative approach to the genre. The work shows Tippett's predilection for incorporating innovative elements within a traditional formal structure. It follows the example of Beethoven's Fourth Piano Concerto in having an expansive opening movement followed by two relatively brief ones. The harmonic basis for much of the piece, however, is built on musical fourths rather than thirds. These chords are treated as consonant, primary harmonies instead of their previously traditional role as dissonances that required resolution. This harmonic base supports a florid lyricism not far removed from The Midsummer Marriage.

Sir Michael Kemp Tippett (2 January 1905 – 8 January 1998) was an English composer who rose to prominence during and immediately after the Second World War. In his lifetime he was sometimes ranked with his contemporary Benjamin Britten as one of the leading British composers of the 20th century. Among his best-known works are the oratorio A Child of Our Time, the orchestral Fantasia Concertante on a Theme of Corelli, and the opera The Midsummer Marriage. Tippett's talent developed slowly. He withdrew or destroyed his earliest compositions, and was 30 before any of his works were published. Until the mid-to-late 1950s his music was broadly lyrical in character, before changing to a more astringent and experimental style. New influences—including those of jazz and blues after his first visit to America in 1965—became increasingly evident in his compositions. While Tippett's stature with the public continued to grow, not all critics approved of these changes in style, some believing that the quality of his work suffered as a consequence. From around 1976 his late works began to reflect the works of his youth through a return to lyricism. Although he was much honoured in his lifetime, critical judgement on Tippett's legacy has been uneven, the greatest praise generally reserved for his earlier works. His centenary in 2005 was a muted affair; apart from the few best-known works, his music has not been performed frequently in the 21st century. Having briefly embraced communism in the 1930s, Tippett avoided identifying with any political party. A pacifist after 1940, he was imprisoned in 1943 for refusing to carry out war-related duties required by his military exemption. His initial difficulties in accepting his homosexuality led him in 1939 to Jungian psychoanalysis; the Jungian dichotomy of "shadow" and "light" remained a recurring factor in his music. He was a strong advocate of music education, and was active for much of his life as a radio broadcaster and writer on music.

The Symphony No. 1 by the British composer Michael Tippett was completed in 1945.

Michael Tippett's Symphony No. 4 was written in 1977 as a commission for the Chicago Symphony Orchestra, who premiered it on 6 October of that year under the baton of Georg Solti. It was dedicated to Tippett's biographer and friend, Ian Kemp.

Symphony No. 3 by Michael Tippett is a work for soprano and orchestra with text written by the composer. It was composed between 1970 and 1972 and received its premiere on 22 June 1972 at the Royal Festival Hall, London, performed by the London Symphony Orchestra with the soprano Heather Harper conducted by Colin Davis. The symphony is notable for its use of blues and its direct quotation of the opening of the finale of Beethoven's Ninth Symphony. The work criticises the ecstatic and utopian understanding of the brotherhood of man as expressed in the Ode to Joy and instead stresses man's capacity for both good and evil. The work is consequently characterised by contrasting and conflicting parts, its overall design being "one massive antithesis".

Michael Tippett's Symphony No. 4 was written in 1977 as a commission for the Chicago Symphony Orchestra, who premiered it on 6 October of that year under the baton of Georg Solti. It was dedicated to Tippett's biographer and friend, Ian Kemp.

A concerto (; plural concertos, or concerti from the Italian plural) is, from the late Baroque era, mostly understood as an instrumental composition, written for one or more soloists accompanied by an orchestra or other ensemble. The typical three-movement structure, a slow movement (e.g., lento or adagio) preceded and followed by fast movements (e.g., presto or allegro), became a standard from the early 18th century. The concerto originated as a genre of vocal music in the late 16th century: the instrumental variant appeared around a century later, when Italians such as Arcangelo Corelli and Giuseppe Torelli started to publish their concertos. A few decades later, Venetian composers, such as Antonio Vivaldi, had written hundreds of violin concertos, while also producing solo concertos for other instruments such as a cello or a woodwind instrument, and concerti grossi for a group of soloists. The first keyboard concertos, such as George Frideric Handel's organ concertos and Johann Sebastian Bach's harpsichord concertos, were written around the same time. In the second half of the 18th century, the piano became the most used keyboard instrument, and composers of the Classical Era such as Joseph Haydn, Wolfgang Amadeus Mozart and Ludwig van Beethoven each wrote several piano concertos, and, to a lesser extent, violin concertos, and concertos for other instruments. In the Romantic Era, many composers, including Niccolò Paganini, Felix Mendelssohn, Frédéric Chopin, Robert Schumann, Johannes Brahms, Pyotr Ilyich Tchaikovsky and Sergei Rachmaninoff, continued to write solo concertos, and, more exceptionally, concertos for more than one instrument; 19th century concertos for instruments other than the piano, violin and cello remained comparatively rare, however. In the first half of the 20th century, concertos were written by, among others, Maurice Ravel, Edward Elgar, Richard Strauss, Sergei Prokofiev, George Gershwin, Heitor Villa-Lobos, Joaquín Rodrigo and Béla Bartók, the latter also composing a concerto for orchestra, that is without soloist. During the 20th century concertos appeared by major composers for orchestral instruments which had been neglected in the 19th century such as the clarinet, viola and French horn. In the second half of the 20th century and onwards into the 21st a great many composers have continued to write concertos, including Alfred Schnittke, György Ligeti, Dmitri Shostakovich, Philip Glass and James MacMillan among many others. An interesting feature of this period is the proliferation of concerti for less usual instruments, including orchestral ones such as the double bass (by composers like Eduard Tubin or Peter Maxwell Davies) and cor anglais (like those by MacMillan and Aaron Jay Kernis), but also folk instruments (such as Tubin's concerto for Balalaika, Serry's Concerto in C Major for Bassetti Accordion, or the concertos for Harmonica by Villa-Lobos and Malcolm Arnold), and even Deep Purple's Concerto for Group and Orchestra, a concerto for a rock band. Concertos from previous ages have remained a conspicuous part of the repertoire for concert performances and recordings. Less common has been the previously common practice of the composition of concertos by a performer to be performed personally, though the practice has continued via certain composer-performers such as Daniil Trifonov.

Variations on an Elizabethan Theme (also seen as Variations on Sellinger's Round) is a set of variations for string orchestra, written collaboratively in 1952 by six English composers: Lennox Berkeley, Benjamin Britten, Arthur Oldham, Humphrey Searle, Michael Tippett and William Walton. Imogen Holst also played an important role in orchestrating the overall work, but she did not write a variation of her own. The variations were written to celebrate the forthcoming coronation of Queen Elizabeth II in June 1953. (Benjamin Britten also wrote his opera Gloriana in honour of this occasion.)