noun
a type of player piano that uses a roll of paper with perforations to play music
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The music roll is a type of mechanical device used to play music in a player piano.
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I found an old music roll in the attic that belonged to my great-grandparents.
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Hey, pass me that music roll so we can listen to some tunes on the player piano.
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The new technology is like a music roll, constantly changing and evolving.