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thumb|One of the pyrophones constructed by Kastner, as seen in 2013 in the Musée historique de Strasbourg upright|thumb|Durant's diagram of the sound-creating gas burners, the, "mechanisms that allowed two flames to unite or diverge to produce a musical note" thumb|Kastner
thumb|One of the pyrophones constructed by Kastner, as seen in 2013 in the Musée historique de Strasbourg upright|thumb|Durant's diagram of the sound-creating gas burners, the, "mechanisms that allowed two flames to unite or diverge to produce a musical note" thumb|Kastner
A pyrophone, also known as a "fire/explosion organ" or "fire/explosion calliope" is a musical instrument in which notes are sounded by explosions, or similar forms of rapid combustion, rapid heating, or the like, such as burners in cylindrical glass tubes, creating light and sound. It was invented by physicist and musician Georges Frédéric Eugène Kastner (born 1852 in Strasbourg, France – died 1882 in Bonn, Germany), son of composer Jean-Georges Kastner, around 1870.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).