I just finished reading a terrific short essay in Wired magazine, by the novelist William Gibson. He's talking, essentially, about paradigm shifts in music making/listening brought about by technology. A short quote:
"Meanwhile, in the early '70s in Jamaica, King Tubby and Lee "Scratch" Perry, great visionaries, were deconstructing recorded music. Using astonishingly primitive predigital hardware, they created what they called versions. The recombinant nature of their means of production quickly spread to DJs in New York and London.
"Our culture no longer bothers to use words like appropriation or borrowing to describe those very activities. Today's audience isn't listening at all - it's participating. Indeed, audience is as antique a term as record, the one archaically passive, the other archaically physical. The record, not the remix, is the anomaly today. The remix is the very nature of the digital.