String quartet movements with a large-scale structure similar to that of a symphony: Substantial modifications to the typical structure were already achieved in Beethoven's later quartets, and despite some notable examples to the contrary, composers writing in the twentieth century increasingly abandoned this structure. Many other chamber groups can be seen as modifications of the string quartet: Further expansions have also been produced such as the String octet by Mendelssohn. Notably, Schoenberg included a soprano in the last two movements of his second string quartet, composed in 1908. This instrumentation of adding a voice is succeeded by Hindemith , Finzi, Respighi, Ginastera,
Circadian String Quartet and a new piece by Aminikia in October 2017. Members of Circadian String Quartet perform throughout the Bay Area and also serve as resident teaching artists for the Zephyr Point Chamber Music Workshop. Members of the quartet are active music teachers and work with musicians of all ages in developing their musical abilities in chamber music. The members of the Circadian String Quartet are: Circadian String Quartet Bay Area-based Circadian String Quartet was founded in 2013. The ensemble performs a wide range of classical and contemporary repertoire with folkloric or cultural significance, as well as original pieces composed or arranged