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Continue to ChatPreparing to improvise is at a level commensurate with mastering the structure in a European classical piece. Another way to define improvisation is spontaneous melody. In order to improvise, a player first needs to have memorized and analyzed the harmonic structure of so many pieces. - Jimmy Heath from https://whatsmyquote.com/quote/preparing-to-improvise-is-at-a-level-commensurate-with-mastering-the-structure-in-a-european-classical-piece