Haydn's music is often characterized as cheerful, inventive, and highly sophisticated. His works span a wide range of genres, including symphonies, string quartets, piano sonatas, operas, and oratorios.

One of Haydn's most distinctive qualities as a composer is his sense of humor. He frequently incorporated unexpected musical gestures, witty musical jokes, and playful rhythms into his compositions. For example, in his Symphony No. 94, also known as the "Surprise Symphony," Haydn famously included a sudden fortissimo chord in the second movement to wake up any dozing audience members.

In addition to his humor, Haydn was also known for his innovative approach to form and structure. He was a master of the sonata form, which he used to create multi-movement works that were both cohesive and musically adventurous. His development of the string quartet and symphony as genres also had a profound impact on the development of classical music in the 18th and 19th centuries.

Overall, Haydn's music is marked by a combination of technical mastery, inventive musical ideas, and a unique sense of humor. His works continue to be beloved by classical music enthusiasts around the world.
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