String quintet in 17th century Italy and can be seen as early as 1607 in Claudio Monteverdi's opera, "L'Orfeo". It can also be applied to the standard five-part orchestral string section: first violins, second violins, violas, cellos, and double basses. String quintet A string quintet is a musical composition for five string players. As an extension to the string quartet (two violins, a viola, and a cello), a string quintet includes a fifth string instrument, usually a second viola (a so-called "viola quintet") or a second cello (a "cello quintet"), or occasionally a double bass. Notable examples of classic "viola quintets", in
String Quintet (Schubert) viola with a second cello; however, Schubert's use of the second cello is very different from Boccherini's, who uses the additional cello to create an additional viola line. Alfred Einstein has proposed that Schubert's use of a second cello to enhance the lower strings may have been suggested by George Onslow, who used a double bass in some of his quintets. The string quintet consists of four movements in the usual quick-slow-scherzo-quick pattern: In common with other late Schubert works (notably, the symphony in C major, D. 944, the piano sonata in B-flat major, D. 960, and the string quartet