Sirius had always wanted to be a musician. Ever since he was seven years old and working out that noise could be invigorating and interesting and could actually mean something beyond bangs and clashes. He still, years later when he was sixteen and being asked by a stern faced Professor McGonagall, wanted to be a musician. It was, like so many things were and are and will be, a secret, because Sirius thought he was childish and stupid for wanting to be something so decidedly muggle. One secret he still kept close to his heart and pretended Remus didn't know.