Trio, quartet, and seven.
A Trio by Schubert, a Fugue by Grieg, Quartets by Saint Saens and Grainger, and Room Music for Seven Players by Grainger.
Fugue in F Minor - Edvard Grieg
String Quartet No. 2 in G major, Op. 153: I. Allegro animato - Camille Saint Saens
Mock Morris, for 7 Strings - Percy Aldridge Grainger