The one obvious thing is that the devices are so good now that you can also see their limitations extremely well.

I love the cello, I love the physical sense of an instrument that's about the size of your body that vibrates enough that even if you play an open string, you feel it.

I started thinking, my gosh, all this sophisticated software for measuring how Yo-Yo plays, and how he moves and this technique of the bow, I should be able to use similar techniques for measuring the way anybody moves, and so somebody who is not a professional or a trained musician, I should be able to make a musical environment for them.

I did take composition lessons when I was in high school, so I wrote piano pieces. I wrote some chamber music. I don't think any of that was particularly interesting.

I row for about 40-45 minutes every morning and put in my iPod and it's a huge range. That's when I listen to either things that I just love and know very well and just want to pay attention, it's also where I listen to things that are new that I want to get to know.

I think a double bass for me would be too much effort. But the cello, you're really engaged and the sound is kind of right here. So, it feels like being merged, married to an instrument.

There were a lot of things happen in the mid-'80's that all of a sudden made it possible to do a lot of very quick interactive music.