Ostinato
In music, an
ostinato is a motif or phrase that persistently repeats in the same musical voice, usually at the same pitch. The best-known ostinato-based piece may be Ravel's
Boléro. The repeating idea may be a rhythmic pattern, part of a tune, or a complete melody in itself. Both
ostinatos and
ostinati are accepted English plural forms, the latter reflecting the word's Italian etymology. Strictly speaking, ostinati should have exact repetition, but in common usage, the term covers repetition with variation and development, such as the alteration of an ostinato line to fit changing harmonies or keys. "If the cadence may be regarded as the cradle of tonality, the ostinato patterns can be considered the playground in which it grew strong and self-confident." —Edward E. Lewinsky Within the context of film music, Claudia Gorbman defines an
ostinato as a repeated melodic or rhythmic figure, to propel scenes which lack dynamic visual action.