A lot of it was just trying to get the movement to work, and we couldn't really put the sounds to it until it was choreographed. Plus, this was a new direction for Elizabeth. I always call myself both a composer and a sound designer. It's one that I think was addressed by Varese who was born in 1890 or so. So, a lot of people came up with terms like that.
Music is a sort of subset of sound design.
I like the term sound design because it's sort of like interior design. My whole idea with the twentieth century, with the electronic media, especially with digital media, is we've actually invented new physical spaces. Electronic music started as a radio art. So, you're traveling in your car and you could be going down High street, and you could be listening to Javanese gamelan. There are other new forms of space, too.