I feel like, in many ways, Billie Holiday's still very under-appreciated as an artist. People focus on her voice, and all of the very recognizable vocal things that she does, which are great. But I wanted to, with this project, start the conversation again about her as a radical feminist, as a civil rights activist - taking a stance. And also just [her] being a non-conformist.

I go by the "Miles Davis school of production and band-leading", where you pick the best musicians you can, you provide them with a minimum of direction, and you just let the music happen. I've seen it work time and time again.

The level of musicianship in New York is the highest in the world. It's tough to get into. You start gigging making 50 dollars a night, or playing for nothing to get to something. It's insane. It's like being a modern dancer, or something - the hardest thing to make money from.

I also tried to focus on songs that Billie Holiday wrote, songs that she had a hand in shaping, like "Strange Fruit"; songs that were written for her or songs that she wrote herself, like "Fine and Mellow" or "God Bless The Child."

If you look at the other singers of Billie Holiday's time, they were really trying to entertain. They were trying to make people feel good. They were singing fast - and she was singing the blues.

I don't get writer's block. I don't try to write anything; when something comes, I write it. I just practice and when I get an idea I write it down.

I actually started the whole project some years ago with a live debut at Ancienne Belgique in Brussels. The focus was mainly on my favorite period of Billie Holiday, which was the late-50s Verve recordings, with essentially a small version of the Count Basie band.