I think Katy B encapsulates young London in a way I never could. She reps London harder than anyone song-wise since Lily Allen.

So sometimes if I'm working with a rapper, like Ghostface Killah or Nas, producing usually means, in hip-hop, that you make the music. You make the beat, and you give it to them. And they write the rhymes.

I really love something about being around the recording studios - you know, like, those days in the '80s they'd be, like, in the studio 'til 4, 5, 6 in the morning working on these songs.

DJing is an art that I have the utmost respect for, and I've been practising it since I was 17 years old. Doing Tom Cruise wedding-type things becomes the focal point of every interview, and you realize that you have to cut it out if you don't want to be answering questions about that.

Then, you know, the other more-traditional role of the producer in, like, the kind of Quincy Jones sense is kind of part arranger. So you're coming up with, like, these - you hear these songs that are quite bare-bones, and you dream up what's the band doing? What's the rhythm section doing? What's the guitars, strings, pianos - that sort of thing. It's almost like a little toolbox.

I never studied jazz technically; I just know and love the music.

So when I was working with Amy Winehouse on "Back To Black," you know, she had all these beautiful songs, incredibly well-written and just her on an acoustic, nylon-string guitar. And she'd play them for me, and then I would kind of drum up my idea of what I thought - make a demo with what I thought the drums should be doing, the guitars - like, quite a crude demo.