probably the dino among the (known) precursors of rap. today it eh know only a few. Rappers Delight has triggered funk and break-dance-wave in the early eighties, queen to "another one`s bites the dust" more than just excited (compare!) and ultimately the schrittmas for groovy disco-music and today's hip -hopp specified. I think that one of the most innovative music tees is also today still since the invention of rock'n'roll. an essential. without equal.
