Some violinists and cellists use Stradivari instruments in their work. This style was previously used solely by violinists, violists and cellists. Instrumental music was introduced and there were soon sixteen violinists and three cellists. The Massive Violins are a musical ensemble of singing cellists. Greenwood had the cellists detune their cellos, creating a "growling" sound. For "Daydreaming", Greenwood had the cellists detune their cellos, creating a "growling" sound. Other cellists performing Indian classical music are&colon; Nancy Lesh (Dhrupad) and Anup Biswas. The recordings went on to spur a revolution among Bach aficionados and cellists alike. The suites have since been performed and recorded by many renowned cellists. He was described in "The Strad" as the "doyen of British cellists". Cellists may mix different types of strings on their instruments. David Popper was one of the last great cellists who did not use an endpin. For a list of notable cellists, see the list of cellists and . He is widely considered one of the greatest cellists of the 20th century. Rostropovich was a huge influence on the younger generation of cellists.