do you know if this is the black one or the white one? >> i don't know. it's one of 'em. >> it's interesting. people always sort of joke around about blues where it's sort of like my dog died, my wife left me. i ain't got no money left. >> it happens. it happens. >> but blues does have its roots in talking about difficult times. >> i would say it started through slavery. you know, slaves in the field wanting to talk to each other, but they can't. so they had to find ways to do it without being noticed, you know. and that might be an old spiritual song or just a word that they come up with, you know. that started the blues. >> i am by no means an expert on blues. but here's what i do know. you've got delta and you've got hill country. delta is the one that everyone's most familiar with. made famous by muddy waters and one of my parent favorites,