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
Carillon from the lowest note (the bourdon) and may continue up to two and half octaves. In the North American Standard keyboard, all notes can be played on the manual. Because of the acoustic peculiarities of a carillon bell (the prominence of the minor third, and the lack of damping of sound), music written for other instruments needs to be arranged specifically for the carillon. The combination of carillon and other instruments, while possible, is generally not a happy marriage. The carillon is generally far too loud to perform with most other concert instruments. The great exceptions to this are some