Once I had the band, Jason [Moran] and John [Patitucci] and Eric [Harland] - it's very exciting to have that trio of just world-class guys - I already knew it was going to be fantastic. I didn't really tell them anything about it. They didn't know what they were going to play beforehand.

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.

I really like the complexity of jazz, the emotional depth; I feel like there's no other music that's really as satisfying as jazz.

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 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."

For better or for worse, I think my approach to jazz is very traditional, in one sense, but is [also] very out of fashion today. It's about the musicians, and it's about that magic that happens in the moment.