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I've been looking for a webm with sound of a strange contraption consisting of a motor that actuates two reciprocating sections, each attached to a series of thin and long metal rods. Each rod contacts a surface of glass. The webm loops as the glass is scratched, making an unending "nails on a chalkboard" or "scratching glass" kinda noise. I've used every search engine, every variation of terms to describe this, to no avail. It's all stock footage sounds or ASMR bullshit or products showing how to fix scratched glass or other unrelated nonsense.
If someone has this, they might have to post in /wsg/ in a "webm for other boards" or something since it has sound. Picture unrelated.
