Roll type made by gluing the beginning and end of a roll together to form a continuous loop. As the roll passes over the tracker bar it is fed into a storage bin. Advantages: 1. The roll passes over the tracker bar at a constant speed, so no tempo compensation is needed from one part of the same roll to another part. 2. The mechanism is simpler as no rewind/play mechanisms are needed. 3. The music is continuous, with no silent pause for rewinding. Disadvantages: 1. Rolls take several minutes or more to change. 2. Rolls are easily damaged during the changing process. 3. A large amount of space is needed for the roll storage bin in the piano. 4. It is impossible to select tunes by a fast forward or reverse mechanism. Endless rolls were mainly popular during the 1900-1910 decade, although some manufacturers (such as Link and the North Tonawanda Musical Instrument Works) used them in later years. Contrast with: rewind roll.