Last weekend I had a great time covering the NASA Lunar Regolith Challenge–a competition to see who could build the best remotely operated digging moonbot. Between each round, the judges would pack down the material with a machine that sounded like this (not quite exactly like this…I’ve played with the pitch somewhat):
Here’s the same sound, layered against itself three times, each at a different pitch and with a slight filter sweep. There’s some reverb on there too.






