Designed by the American company Aeolian, this piano plays by itself. What is more it is equipped with a system known as Duo-Art, which allows it to express the sensitivity of the rendition by varying the dynamics of the action. The expressions are specially written on the edges of the roll of paper.
In quieter sections the wind pump, operated by a squirrel cage type motor, remains very quiet.
Great jazz composers: Fats Waller, Scott Joplin and others preferred making recordings on this instrument rather than on the engraved wax of the newly-developing phonograph.