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Part of Bach's seminal "The Well-Tempered Clavier" (Book I, 1722), this Prelude in E-flat minor (BWV 853) exemplifies Baroque keyboard mastery. Composed to demonstrate equal temperament tuning, it allowed all keys to sound in tune—a revolutionary concept. The prelude features solemn, harmonically rich chords interwoven with an ornate melodic line, creating a contemplative and profound atmosphere. Though originally for harpsichord, its structural brilliance makes it adaptable to various instruments.