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In page String quartet:

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In the modern era, the string quartet played a key role in the development of Schoenberg (who added a soprano in his String Quartet No. 2), Bartók, and Shostakovich especially. After the Second World War, some composers, such as Messiaen questioned the relevance of the string quartet and avoided writing them.[citation needed] However, from the 1960s onwards, many composers have shown a renewed interest in the genre.