pyrophone
noun
Any of various pieces of apparatus designed to produce musical sounds using flames or explosions; especially a musical instrument (invented by G. F. Kastner in 1869) resembling a small pipe organ, bearing a series of glass tubes, each containing two gas flames burning close together, and producing a resonant sound when the flames are separated by pressing down a key.
Origin
Late 19th century; earliest use found in Galaxy Magazine. After French pyrophone.