Cylinder music box with three or more cylinders affixed to end plates which are mounted on a common shaft, in a "Ferris wheel" arrangement. The cylinders, each of which has several tunes on it, can be changed by rotating the entire assembly so that another cylinder is brought into playing position.

See automatic roll changer, revolver box.

Standard and most-used type of paper roll for pianos, organs, and orchestrions. Wound on a spool. The end tab of the roll is attached to a take-up spool, which pulls the roll over a tracker bar as it plays. When the performance ends, the roll is rewound on the original spool. When rewinding is completed, the same performance can be heard again, or the roll can be exchanged with another. See endless roll.

When a rewind roll reaches the end of the playing notes, a special rewind (or reroll) perforation causes the roll frame to shift to the rewind position. The pneumatic mechanisms which actuate the playing notes are disengaged so that no notes will be played while the roll is rewinding. Rewinding is done at high speed. When the leader of the roll reaches the tracker bar, a rewind-to-play hole in the tracker bar (or, in some instruments, a mechanical device fitted to the take-up spool) actuates a mechanism which shifts the roll frame from rewind to forward. The roll is then ready to play another performance or to be taken from the instrument. * Synonym: reverse. * Dutch: terugspoelen. * French: retour. * German: Rückrollen, zurück, zurückrollen.

In a dance organ, a term synonymous with maraca (also listed in this Glossary).