Divertimento for String Orchestra (Bartók) of imitation, fugato, and contains a three voice fugue. Bartók's Divertimento is scored for string orchestra: Violin I, II, Viola, Violoncello, and Double Bass, all of which contain divisi sections. Unlike the majority of orchestral scores, the minimum number of players in each string section is specified: 6 1st Violins, 6 2nd Violins, 4 Violas, 4 Violoncellos, 2 Double Basses. Typically 8 minutes long, the opening movement is presented as a waltz with specific gypsy influences evident melodically, through the use of various modes and non-traditional scales, and rhythmically, through the use of irregularly placed accents and extended syncopated rhythms.
Piano quintet scored for piano, oboe, clarinet, horn, and bassoon. Not until the middle of the 19th century did Robert Schumann's Piano Quintet in E major, Op. 44 (1842) firmly establish music for piano and string quartet as a significant, and quintessentially Romantic, chamber music genre. By 1842, the string quartet had evolved into the most important chamber music ensemble, and advances in the design of the piano had expanded its power and dynamic range. Bringing the piano and string quartet together, Schumann's Piano Quintet took full advantage of the expressive possibilities of these forces in combination, alternating conversational passages between the