I'm not suggesting people abandon musical instruments and start playing their cars and apartments, but I do think the reign of music as a commodity made only by professionals might be winding down.

It's a fundamental, social attitude that the 1% supports symphonies and operas and doesn't support Johnny learning to program hip-hop beats. When I put it like that, it sounds like, 'Well, yeah,' but you start to think, 'Why not, though?' What makes one more valuable than another?

Why not invest in the future of music, instead of building fortresses to preserve its past?

I came to New York to be a fine artist - that was my ambition.

So much of inspiration comes from collaboration with other musicians.

NASA has been one of the most successful public investments in motivating students to do well and achieve all they can achieve. It's sad that we are turning the programme in a direction where it will reduce the amount of motivation and stimulation it provides to young people.

I've never been a big fan of subtle art. I like art that gets deep into my head and starts my brain spinning with new ideas and inspiration and my whole body is full of energy.

Tour isn't good for writing, but it's good for inspiration.