I found myself in Zurich Airport. I'd done a TV show, oddly enough, with Mavis Staples. That's the way they do it in Switzerland. And I'd had a bit of a late night with members of her band. And I was - my flight was delayed. And I was sitting in the airport, and I just came up with the idea. And by the time, we landed at Heathrow, I'd pretty much sort of got it.

I'm very fussy about how my records sound, but I'm very aware that because of the way they sound, I will never be a big-selling, mainstream artist because the public has gotten conditioned to hearing pop music in a certain way. And I don't do it that way.

You've got to really know your song, inside and out.

My latest theory is that it's - well, I describe it as, like, being in an apartment with kind of thin walls. And in the apartment next door, they've got a radio tuned constantly on - tuned to a really cool radio station. It's on all the time. And you can just hear it coming through the wall all the time.

You want to sing this song. And so it goes on until eventually, after - well, however long it can take - sometimes a few days, sometimes months - you piece the whole thing together.

I found myself in Zurich Airport. I'd done a TV show, oddly enough, with Mavis Staples. That's the way they do it in Switzerland. And I'd had a bit of a late night with members of her band. And I was - my flight was delayed. And I was sitting in the airport, and I just came up with the idea. And by the time, we landed at Heathrow, I'd pretty much sort of got it.

In the '70s, you had to come up with an album every year whether you were ready or not.