Old steam trains often had whistles that worked much like organ pipes, as both are labial aerophones, instruments where air splits against a sharp edge to create sound. Perhaps that's why trains always seemed so alive to me. I breathe. They breathe. Organs breathe. This might be how a choir of trains would sound, gathered together in a depot before sleep.https://coignard.bandcamp.com/album/wiegenlied-f-r-z-ge
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