Beethoven expanded the breadth of the symphony, sonata, concerto, and quartet, breaking many classical music conventions in the process.
Beethoven's compositional contributions exist at the junction of the Classical and Romantic periods. His early works elevated the Classical form to its maximum expressive level, broadening the musical vocabulary in formal, structural, and harmonic ways.
Thus, Beethoven expanded the breadth of the symphony, sonata, concerto,
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