YAMAHA PSS-390 (1990)
realtime FM keyboard / circuit bending mod

49 mini keys || 8 voice polyphony || 2-OP FM digital synthesizer || 7 control switches (spectrum, modulation, attack, decay, release, vibrato, volume) || 100 FM tones || automatic accompaniment with 100 rhythms || speakers || battery powered

circuit bending mod (28 connection points on a patchbay)
which transforms the instrument into a highly intelligent creature, operating according to an algorithm that constantly generates the statistically very best music that is technically possible (ever) and makes people think that it comes from outer space and is being permanently observed by drones from 79 different nations worldwide whatsoever.