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This is a clip of an old spun-steel brake drum. The part is likely from a Ford Model-A of the late 1920’s. I own a set that are shaped and sound exactly like this one. As I tweeted earlier, this is the Stradivarius of found instruments!
Listen to the length of the decay (I actually mute the drum towards the end of the clip). Very different from the modern brake drums we are used to playing/hearing…