VGA, have you seen Jonas Bers' CHA/V project?
https://jonasbers.com/crap-video-synth-for-10/
https://jonasbers.com/chav30/
Basically combining a VGA test signal generator and logic chips to make the world's shittiest audio/video synthesizer. It takes advantage of the fact that the RGB channels in VGA are on their own signal wires and if you send square wave oscillators to these wires you can make cool patterns
This is amazing I need to mess with this so so much omg <33333














