Katz, in chapter 6 of Capturing Sound writes about “The Turntable as Weapon” and how DJs battle each other making music by scratching older records. The art has been called Turntablism and it is a radical example of how a “phonograph effect” where a recording technology like the phonograph has effects on that which is records. In the case of turntablism, the phonograph has the radical effect of becoming an instrument for new music to be performed. See also BBC: History of Vinyl.
Ironically on the djbattles.com site they have a PDF on how to transcribe turntable moves – a system for scoring and annotating what is supposed to be a live and combative art.