First, artist Jake Waldron usually does sculpture;
but he did build a complex noise box, and he circuit-bent a TV set.
Then we have this thing, made of an old SN76477 noisemaker chip.
The guy who built a sequencer out of a Dekatron tube is braver than he realizes–
Dekatrons are erratic and unreliable. Same guy who previously built a modular synth out of tubes.
An experimental analog video synth–very rare to see anyone doing this today.
(Doing it with a VGA monitor simplifies the electronics, because
you don’t have to worry about recombining sync and chroma signals.)
Finally, this defies explanation……
http://ericarcher.net/devices/lite2sound/
is similar to that last video.