I found myself recycling ideas and I saw that I had to invent reasons to compose a piece rather than start from some exciting idea.

I've had a lot of fun writing percussion music. It feels quite similar to writing computer music. But I found myself in the role of choreographer in a way, worrying about physical movement and such.

With a piece of classical music by Haydn, Mozart, or Beethoven, on first listening I'm referencing it with other pieces by them that I know. I think that most people do this - they listen to pieces through the filter of pieces they already know.

I came to what I think of as the critical problem: the aging process of a piece of music. I noticed in the '70s that pieces I wrote would sound great the first time I listened to them and then on repeated hearings they sounded older and older until what seemed exciting and vibrant on first listening became stale.

I was hired for a really excellent academic job early in my life; I was twenty-five when I started at Princeton and I got tenure early on. I really didn't deserve this; I just happened to be in the right place at the right time.

There are, however, composers whose music can only be heard in a chromatic sense. George Perle, for example, wrote pieces that you might think of as leaning in a tonal direction but it's very hard to register a pitch as, say, the sixth degree of a scale, whereas in much of my music I think that's often relatively easy to do.

It's very interesting for me to listen to music with my wife. She's not a musician but she very often makes comments about pieces in ways that are similar to what I'm thinking.