Cathode-Retro: A collection of shaders to emulate the display of an NTSC signal

NTSC was also known for its poor colour reproducability compared to PAL due to how the color signal was modulated. PAL had automatic control where NTSC often required manual adjustment in case the hue was drifted. For that reason NTSC was often said to stand for 'Never Twice the Same Color' or 'Never The Same Color'.

I wonder if any of the shaders also has this behavior of randomly shifting the hue or an ability to change it by a give offset.

Retroarch does have some NTSC filters (combined with svideo/composite input) that are appropriately noisy.

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I'd love to see an option to have the image pincushion and introduces a buzz in the audio from an video signal that was too strong? That was one of my favorite. Everyone focuses on the interlacing, giant pixels shapes, and the fun with chroma bleed, but some of the most bizarre things could happen when you pushed the analog signal too far. The 1 volt peak-to-peak was a rule for a reason, and going past was possible. Terms like whiter-than-white from pushing the video signal from a test pattern past 100ire on a scope could cause issues with the combined RF modulated audio/video signals. The most flagrant offender was white text. If you were competent at your job, you never used 8-bit 255,255,255 for white. That was out of bounds for NTSC, so 235,235,235 was typical instead for white.

The next filter would be the infamous "broadcast safe" filter that would clamp the video signal to video was not higher than 100ire. Allowing for chroma clamping separate from video clamping would be a bonus. Hell, just give the basic functions of a TBC to the users. They don't need to understand what they are doing to the signal so much as just a few knobs to get creative!

Seems like a good spot to mention https://github.com/Swordfish90/cool-retro-term

Cool Retro Terminal is a nice accessory for when doing recording or screenshots - cause it looks cool. Can't use it as my daily driver tho.

And enough settings in there you can make it look like your favourite old one.