Kammermusik (Chamber Music) is the title for eight chamber music compositions by Paul Hindemith. He wrote them, each in several movements, during the 1920s. They in three opus numbers: Op. 24, Op. 36 and Op. 46. Six of these works, Kammermusik Nos. 2–7, are not what is normally considered chamber music – music for a few players with equally important parts such as a wind quintet – but rather concertos for a soloist and chamber orchestra. They are concertos for piano, cello, violin, viola, viola d'amore and organ. The works, for different ensembles, were premiered at different locations and times. The composer was the soloist in the premiere of the viola concertos, while his brother Rudolf Hindemith was the soloist in the premiere of the cello concerto. Kammermusik is reminiscent of Bach's