This is a very unsettling rattle, recorded in a bin of ribbed metal bars, free of reverb or background noise. ...
The Yamaha CS-15 is analog monosynth with 2 VCO, 2 ENV, 2 multimode filters, 2 VCA, 1 LFO.
As all files in this sound pack it is made digitally, so the source material was not a recorded real ...