This is somewhat true, I studied music in college also. Black peoples invented music that began to be taken and morphed to different peoples likings and rock came from this (along with other genres). Rock came out of Jazz but it wasn't an absolute direct correlation. I don't see hardly any similarities between rock and jazz? Besides, I think rock n' roll owes it's roots more to ole' down south bluegrass, folk music, country western, and to a lesser extent White gospel than it does any black music. Rock is not black music, never was. It definately has a bit of a bluesy element to it, but then again, there would be no blues if Whites had not invented the guitar in the first place.