Here’s a query that came up with a student the other day. Decades ago, in the early ’80s, my wife and I attended the wedding in Chicago of a couple of Hispanic friends. The reception was marked by the most amazing music played by a huge mariachi band: over half a dozen brass players, multiple guitars, wild percussion. It was hot, rhythmically intricate stuff whose meters were difficult to parse, and whose melodies took several repetitions to pin down. Le Sacre‘s complexity paled before it. If it wasn’t in meters like 13/8 or 17/16, I couldn’t have proved it myself. The counterpoint had more voices than I could count. I was spellbound. I had never heard anything like it.