"I'm really into serial composition, improvisation based on numbers. We play songs based on sudoku games, just to get students to be able to recognize a chord structure. If they see a seven, then that means it's a seven in the scale. So it kind of connects their minds. The rules are, you can play one note, let's say the nine, as many times as you want, but you can't go to any other note except for, say, the six. So then they have to figure out what kind of rhythm they can add to the notes in order to make them sound like music instead of a robot. I did a commission about four or five years ago in New York, and I wrote a suite—two hours' worth of music-based on a sudoku game. It was great! It's fun. It's another way of thinking about music."