The Chamber Symphony is an instrumental work by Austrian composer Franz Schreker.
The work was composed in 1916 for the centenary of the Vienna Music Academy where Schreker had been teaching since 1912.
The work was first performed on 12 March 1917 by an orchestra consisting of professors from the Vienna Academy, conducted by the composer.
Although often described as a work for 23 solo instruments, the orchestral requirements actually stipulate a minimum of twenty-four players: flute, oboe, clarinet in B flat/A, bassoon, horn, trumpet, trombone, timpani, percussion (xylophone, glockenspiel, cymbals, triangle, tam-tam), harp, piano, celesta, harmonium, and a small string section consisting of four violins, two violas, three cellos and two double basses.
[3] In the preface to the score, the composer recommends augmenting the strings for performances in larger halls.