вариация(на определенную тему • something that is slightly different to the usual form: Pistachio-parmesan truffles are a fun riff on those nut-covered cheese balls your mum used to make.cambridge.orgUniversalLove)
рифф(небольшая ритмическая фигура, часто служащая сопровождением к сольной импровизации в джазе); мелизм(в пении; vocall riff – вокальные мелизмы, но to riff vocal – добавить мелизмов вокалу (напр., в программе для обработки звука или в исполнении песни) lamp8)
Resource Interchange File format(A broad-based specification designed to be used in defining standard formats for different types of multimedia files. A tagged-file specification, RIFF relies on headers that tag individual data elements in a file, identifying them by type and length. Because tags identify data elements, the RIFF specification can be extended to cover new types of elements while continuing to support older applications, which can simply ignore new, unrecognized elements they encounter in a file)
cambridge.org UniversalLove)