 I hear so many things going on. There's the main melody, of course. He's doing the 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.