I don't think of my music as being about something.

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.

Even today, I notice that some of my pieces are explicitly tonal; there are actually tonics and dominants. And then there are pieces that are not tonal. I tend to think that there's a dichotomy that has to do with the way pitches are structured.

I came up in the '60s; that was a time when there was a revolution going on in music. Stravinsky had become a twelve-tone composer; even Aaron Copland was writing twelve-tone pieces at that time!

I had been creating music on tape that was to be listened to as a recording, rather than through performance.

With repeated listenings, a piece eventually becomes its own being. I very often say to students that this is like meeting a person for the first time. When you first meet someone, you reference that person with others who are similar; but, as you get to know that person better, you begin to understand his unique qualities.

Sometimes I imagine that there's a binary division going on in contemporary practice that has to do with chromatic versus diatonic. I notice that I tend to listen in a diatonic sense, that I register a pitch as a member of a diatonic scale, even in a non-tonal context.