Pyrophones, eh?

I was at a musical instrument conference last weekend, and for the first time I heard the classification “pyrophone.” That is, instruments that create sounds from heat and/or fire. I suppose that I’m not much of an organologist if I haven’t heard about this, but at least I’ve got things to learn, eh?! Sorry to split hairs, but unless I grossly misunderstand this, which is entirely possible, isn’t the example below really an aerophone? Feel free to correct me. In any case, beautiful sounds and a fascinating instrument in development.

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