The organ is controlled by the paper roll, but it draws in air from the perforations in the trackerbar (what reads the music from the paper). In short, it's vacuum operated.
A band organ is a musical instrument played mechanicly by a paper roll. The instrument plays when the air goes into the paper roll and simulates a millitary band.
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The organ is controlled by the paper roll, but it draws in air from the perforations in the trackerbar (what reads the music from the paper). In short, it's vacuum operated.