My interest in making music has been to create something that does not exist that I would like to listen to, not because I wanted a job as a musician. I wanted to hear music that had not yet happened, by putting together things that suggested a new thing which did not yet exist. It's like having a ready-made formula if you are able to read it. One of the innovations of ambient music was leaving out the idea that there should be melody or words or a beat… so in a way that was music designed by leaving things out – that can be a form of innovation, knowing what to leave out. All the signs were in the air all around with ambient music in the mid 1970s, and other people were doing a similar thing. I just gave it a name.

Thanks to @russu for the linkie!