even this ethel waters ad, girl left in cold vows revenge. think of black women being allowed to have revenge. and being highlighted in the 20's. this was used as a selling point. that is a massive amount of freedom. women were given the right to vote a couple of years before this. >> it does have a portrait of america at a particular time. and i think paramount was unique, maybe because of expediency, cheapness, just wanting to get to the point. they did not really have a filter. so you really do get the sense of a much more representative view of what america sounded like, in all of its multitudes. >> a point of musical history, did the blues get hijacked by rock 'n roll? >> rock 'n roll is the blues in a 1000 rpm. >> not 78. a thousand. [laughter] >> all modern music, to me, is the blues. >> really? >> i feel that way. i think it is that important. the blues hijacked music. >> and it has been better because of it? >> i think so. if you talk to people who are into sheet music, people who are composers, it is still to this day hard, if you w