A musical form based on a repeated bass line or harmonic progression over which variations unfold continuously. Typically in triple meter and moderate tempo, it creates a hypnotic effect through constant variation over stable foundations.
From Spanish 'pasacalle,' literally meaning 'street passing,' referring to a type of interlude played between theatrical acts. The form evolved from 17th-century Spanish guitar music into a sophisticated compositional technique, reaching its apex in Baroque music with works like Bach's Passacaglia in C minor.
Passacaglia is like musical architecture built on an unshakeable foundation—no matter how elaborate the upper floors become, you always feel that steady ground beneath! This form became the perfect vehicle for composers to show off their variation skills, creating entire musical universes from just a few repeated chords, like watching a master painter create infinite landscapes from the same basic palette.
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