 I hear so many things going on. There's the main melody, of course. He's doing a solo line that's on top. But if you listen closely, he's using not just one voice, but multiple voices on the strings. And that's called counterpoint. And Bach was a master at that. Coming up, how Bach's use of counterpoint inspired some of today's most influential musicians. I'm Brittany Luce, and you're listening to It's Been a Minute from NPR.