Troval Jefferson: “In the band, they have maybe five or six instruments. When you’re on the street, each one of them will give you a different tone. With the tuba, you want to jump higher. With the trumpet, you want to get on your tippy toes. With the trombone you want to hop and skip—and with the saxophone; it’d give you the jitters. Once you get the sound of the music, with all the combined instruments, you want to move—and you