Type of pneumatic or mechanical action which causes a beater or hammer to strike just once when a note is sustained in a music arrangement. Compare to reiterating (also listed in this Glossary).

Mechanical device which produces a slowing rising and falling wailing tone. Incorporated as part of certain photoplayers and theatre organs as a novelty sound effect for accompanying silent films.

Band organ, often with visible brass pipes, used to provide music in a skating rink. * Synonyms: military band organ, trumpet organ (if cylinder-operated).

Tuned sleigh bells, usually with one to six bells per note, mounted on a strap or board which is shaken. Found in certain European fairground organs and in many theatre organs. * French: grelotphone.

The helical gear which laterally shifts the cylinder (from tune to tune) in a musical box or other cylinder or barrel-operated instruments.