Carillon strike the inside of the bells, allowing the performer on the bells, or "carillonneur/carillonist" to vary the intensity of the note according to the force applied to the key. Although unusual, real carillons have occasionally been fitted to theatre organs (instead of the metal bars or chimes more often used in simulation), such as the Christie organ installed at the Regal Cinema, Marble Arch, in London. A carillon-like instrument with fewer than 23 bells is called a chime. The carillon is the second heaviest of all extant musical instruments, only ranking behind the largest pipe organs. The heaviest carillon in
A Sermon, a Narrative and a Prayer that each six-note set begins with the same note . For example, the first hexachord of the inverse form of the row has an interval succession of 11–4–10–1–3 semitones, plus an interval 7, wrapping around from the last back to the first note. By moving the first note in each hexachord to the end and then transposing the result to begin on E, the rotation scheme produces: Stravinsky then in many cases would travel systematically through the array to derive long melodic lines, as he does with this array to produce the canonic passage in the alto and tenor voices