Sound 80 is a recording studio in Minneapolis, Minnesota, United States founded by engineer Tom Jung and composer/musician Herb Pilhofer in 1969. Largely involved with local artists, the studio is best known for recording portions of Bob Dylan's Blood on the Tracks in 1974 and Cat Stevens' Izitso in 1977, as well as demo tapes for Prince's first album For You in 1977. In 1978, Sound 80 made the first digital audio recording to win a Grammy Award—The Saint Paul Chamber Orchestra's recording of Aaron Copland's "Appalachian Spring" and "Short Symphony," and Charles Ives' "Symphony No. 3."