Gavin Sutherland is the Music Director of English National Ballet, and he's a master of an invisible art. He knows how a dancer moves to sound, and how to keep the sounds that come from an orchestra of musicians moving perfectly with a stage full of dancers. He knows every part in detail, and he knows how to make each of them part of all of the others. DancerMusic wanted to learn more about all of this --- about the complex choreography of collaborations that are the heart of Gavin Sutherland's art. So we asked him if he would give us a look inside the art of bringing music to dance, and here's what he told us: