[zazzazzero] posted a YouTube video showing him fidgeting one of those spinners that had been hooked up to a bass guitar pickup. It makes a rather awesome rumbling sound as the pickup registers the bearings rolling around, and when hooked up to a Digidelay effects pedal he moved it beyond the rumble to more of an industrial growl like a factory hum. He also got interesting sounds by tapping on the spinner with a screwdriver.
Then he switched up to using an iPad audio app called Shaper to modify the resulting sound far beyond what he had before, with more effects options available at the touch of a button. All of these sounds can be modulated into the analog synthesizer chain, making this spinner a for-reals musical instrument.
We’ve published more than a couple pieces on music hacking, including this ASDR envelope generator project and the Atom Smasher guitar pedal.