The Sinfonia Concertante K 364 is scored for solo violin, solo viola, two oboes, two horns, and strings. The arrangement for performed is for string sextet (two violins, two viola and two cellos) first published in 1808. The work appears in a number of arrangements including a piano trio and another for two pianos.
BERG arr MULLER Piano Sonata Op 1 arr string sextet
MOZART Sinfonia Concertante (string sextet version)