Chopin wrote 27 etudes; two sets of 12 (op.10 and op.25) and
"Three New Etudes."
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Jakob Dont was a 19th-century Austrian violinist and composer known for his violin etudes, particularly the "24 Etudes and Caprices, Op. 35" which are often studied by advanced violinists for technical development.
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Joel Godard's birth name is Joel Clinton Godard Jr..