William Walton's Sinfonia Concertante is a three-movement piece for piano and orchestra, first performed in 1928.
[1] He dedicated each movement to one of his friends and patrons the Sitwells, the first to Osbert, the second to Edith and the third to "Sachie" (Sacheverell).
[3] Walton substantially revised the work in 1943 removing orchestral counterpoint and simplifying the solo piano part.
[2] The instrumentation of the original version comprises piano solo, with two flutes, piccolo, two oboes, cor anglais, clarinet, bass clarinet, two bassoons, contrabassoon, four horns, three trumpets, three trombones, tuba, timpani, two percussion (tambourine, cymbals, side drum, bass drum, glockenspiel, xylophone) and strings.
[2] The revised version is scored for piano solo, with two flutes, piccolo, two oboes, cor anglais, two clarinet, two bassoons, four horns, two trumpets, three trombones, tuba, timpani, two percussion (tambourine, cymbals, side drum, bass drum, glockenspiel, xylophone) and strings.