Ableton just released some really terrific and weird samples: “…the result of thousands of hours of experiments with tape loops, tone generators, filters, delays, and weird, one-of-a-kind electromechanical inventions. These explorations were produced at a legendary sound laboratory, the Polish Radio Experimental Studio (PRES) from 1957 until the '80s.”
Get them here: https://loop.ableton.com/loop-at-home/daily-challenge-radio-rework/