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 Musical History to shell out for the full Box Set, Capitol released a single CD+DVD abridged version titled The Best of A Musical History in 2007. It included a selection of what the compilers felt were the best tracks of the five CDs, as well as a shorter version of the DVD. The first disc focuses on the period from 1961 through 1968, giving the first legitimate release on compact disc to four of five single sides the group recorded in 1965, the fifth previously released on 1994's "Across the Great Divide". Opening with two tracks featuring an early incarnation of the