Tosca was a prolific partnership between Richard Dorfmeister (of the trip-hop production team Kruder & Dorfmeister) and fellow producer Rupert Huber. Recording for K&D's G-Stone label, the outfit released five lush studio albums between 1997 and 2009, including Opera, Delhi9, and No Hassle (with the exception of No Hassle, all of them featured vocal collaborations), as well as a series of remix compilations. The duo's sound varied only slightly throughout the years, centered around mellow downtempo rhythms with occasional nods to the dancefloor. ~ John Bush, All Music Guide
Richard Dorfmeister and Rupert Huber first met in school, and began experimenting with tape machines, Indian music, and poetry lyrics, under the name of Dehli9[1]. After school, Dorfmeister and Huber went their separate ways: Dorfmeister began producing and DJing with Peter Kruder, and Huber worked in the experimental music scene. In 1994, Dorfmeister and Huber released their first 12", entitled "Chocolate Elvis"[1], on Kruder and Dorfmeister's G-Stone Recordings.