In the 1990s I got to play in a group that played in prisons in California. We would play in maximum security wards. It was infuriating. Those kinds of situations stick with me. We got to come in and play music for them because that's a way of caring, just offering something, a gift, basically. They're basically the most grateful audiences I've ever experienced, because nobody's giving them anything.

The thing about physicists is that they tend to think that everything is physics. I don't. That's not what music is to me. You can explain aspects of it in physical terms, including the physics of anatomy: how our bodies move, the torsional moment of inertia, the way you move your body to a beat, the inherent periodicities of the heartbeat, the gait. That's physics, too, I guess - maybe they'd call it biophysics.

In the 1990s I got to play in a group that played in prisons in California. We would play in maximum security wards. It was infuriating. Those kinds of situations stick with me. We got to come in and play music for them because that's a way of caring, just offering something, a gift, basically. They're basically the most grateful audiences I've ever experienced, because nobody's giving them anything.

I teach a graduate seminar called "Theorizing Improvisation" that is pretty interdisciplinary, but really makes students deal with black studies seriously. A lot of authors of color, a lot of women of color - those become central to the intellectual trajectory. It considers music, but it also considers areas of thought that might seem unrelated to music. That's partly because we're expanding the notion of what music is beyond objects, beyond scores, beyond things.

I find myself skeptical of music that forces you to have a certain experience, emotional reaction, or specific constructive arc of experience. But performers should still take care of that, to a certain extent - how does it add up? What you want from performance, because we're all in a room together, is that somehow we've gotten somewhere at the end, together. You could call that a sense of narrative, but it's not so obvious how that happens. One way it happens is by everyone caring about it happening.

In a mystical sense, three can become one, in the sense that two is not one; three is a way of resolving difference between two. It's about creating balance: of energies, of dispositions. Sonic balance. That's the approach for me, what it means.

It is one thing to be a virtuoso, but a different thing to play with compassion.