 Since Mac the Knife is the same eight bars of melody over and over, one way you make it more interesting is to keep modulating. Well, I want to listen to one last cut before we let you go. It's the version Sonny Rollins recorded in 1956 on his historic album Saxophone Colossus. This is actually pre-Louie Armstrong. That's around the same time. Well, and the interesting thing is here, it's not even called Mac the Knife.