Mechanism in an automatic musical instrument which turns off several (or all) pipe ranks, instruments, or functions, simultaneously. In some examples, including certain fairground and street organs, the general cancel turns one or more ranks on at the same time it cancels the others. See cancel.

gear. See stop.

Playing the notes of a musical scale in order rapidly within a piece of music. The effect is a rapid sweep up or down the scale.

See orchestra bells.

Speed-control device in an automatic musical instrument. Many different types including: 1. Fan-fly type with rotating fan blades, used in music boxes and certain barrel-operated instruments. 2. Pneumatic type which regulates the speed of travel of a piano roll by regulating the amount of suction to the air motor. 3. Electrical fly-ball type in which rotating weights open and close contacts, as in a Mills Violano-Virtuoso.