1) Mechanical musical instrument 
Orchestrion is a generic name for a machine that plays music and is designed to sound like an orchestra or band. Orchestrions may be operated by means of a large pinned cylinder or by a music roll and less commonly book music. The sound is usually produced by pipes, though they will be voiced differently from those found in a pipe organ, as well a...
• (n.) A large music box imitating a variety of orchestral instruments.
Or·ches'tri·on noun A large music box imitating a variety of orchestral instruments. 
a mechanical musical instrument, resembling a barrel organ but more elaborate, for producing the effect of an orchestra.