This orchestra was a musical group comprised of Hogwarts School of Witchcraft and Wizardry students. They sometimes play by themselves, for public entertainment, and sometimes accompany the Frog Choir. The orchestra was comprised of saxophonists, violinists, cellists, flutists, drummers, harpists, tubists and harpsichordists. In the 1990s, its conductor was Professor Flitwick.