The Piano Sonata No. 9 in E major, Op. 14, No. 1, is an early-period work by Ludwig van Beethoven, dedicated to Baroness Josefa von Braun. It was composed in 1798 and arranged – not transcribed {citation needed} – for string quartet by the composer in 1801 (Hess 34), the result containing more quartet-like passagework and in the more comfortable key of F major.
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