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.