Pierre Henry
While repetition is used in the musics of all cultures, the first musicians to use loops, as early as 1944, were electroacoustic music pioneers such as Pierre Schaeffer, Halim El-Dabh, Pierre Henry, Edgard Varèse and Karlheinz Stockhausen. In turn, El-Dabh's music influenced Frank Zappa's use of tape loops in the mid-1960s.