Gaspar Cassadó was a Spanish composer and cellist renowned for his masterpieces, including Requiebros and the Green Devil's Dance. As a cellist, Cassado was more formal and honorable than flamboyant in his approach.  He was a successful musician, and his compositions are still performed today. In 1964, Cassado debuted six unpublished Boccherini's cello sonatas and played them on a Strad cello, which the composer once owned.