A year or two ago, one of my copyright students called to my attention a problem that seemed to him to pose unique difficulties for the copyright statute. The problem arises because of a technology called digital sampling.' Digital sampling is a new threat to performers' rights that has grown out of the combination of digital recording technology with music synthesizer technology. This threat is a very recent one. Indeed, the digital sampling problem is so new that copyright lawyers haven't yet figured out how to think about it.
Litman, Jessica D. "Performer's Rights and Digital Sampling under U.S. and Japanese Law." Law Quad. Notes 32, no. 2 (1988): 36-43.