orchestrina di camera

from The Century Dictionary.

• noun One of a group of small reed-organs, invented by Evans of London, which are intended for solo use in the place of certain orchestral instruments, such as the flute, the clarinet, the oboe, the bassoon, and the French horn, the tone of each instrument being skilfully imitated by varying the form of the reeds or of their wind-channels. They are serviceable as substitutes for a real orchestra and for the study of orchestral music.