Ludwig van Beethoven (, ; German: [ˈluːtvɪç fan ˈbeːtˌhoˑfn̩]; baptised 17 December 1770 – 26 March 1827) was a German composer and pianist. A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers. His best-known compositions include 9 symphonies, 5 piano concertos, 1 violin concerto, 32 piano sonatas, 16 string quartets, his great Mass the Missa solemnis, and one opera, Fidelio.

Born in Bonn, then the capital of the Electorate of Cologne and part of the Holy Roman Empire, Beethoven displayed his musical talents at an early age and was taught by his father Johann van Beethoven and by composer and conductor Christian Gottlob Neefe. At the age of 21 he moved to Vienna, where he began studying composition with Joseph Haydn and gained a reputation as a virtuoso pianist. He lived in Vienna until his death. By his late 20s his hearing began to deteriorate, and by the last decade of his life he was almost completely deaf. In 1811 he gave up conducting and performing in public but continued to compose; many of his most admired works come from these last 15 years of his life.

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The Alexander String Quartet is a string quartet based in San Francisco. Formed in New York in 1981, the Alexander String Quartet has since 1989 been Ensemble in Residence of San Francisco Performances and directors of the Morrison Chamber Music Center in the College of Liberal and Creative Arts at San Francisco State University.In 1982, the Alexander String Quartet was the first string quartet to win the Concert Artists Guild competition. In 1985, the Alexander String Quartet was the first American string quartet to win the Portsmouth International String Quartet Competition (now the Wigmore Hall London International String Quartet Competition), winning both the audience prize and the jury's highest prize.