alt Hacker NewsOne of the things that I'm curious about: How easy / hard is it to use the same NES game with higher resolution / color graphics, and sample-based sound?
Are there any emulators out there that let you swap in higher resolution assets so a game can be freshened without a complete port?
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I would not think so, at least not in a meaningful way. That would require to edit the cartridge data thus the ROM, as all sprite data was contained within the cartridge. Sample based sound is impossible natively, as NES and older game consoles don't work with digital data but synthesizers. You could perhaps synthesize the music to WAV files and then enchance it. But then again, NES and thus its emulators have no way of playing digitized audio!
Mesen has texture packs. Don't know about sound, you'd have to reverse each game's sound driver first. https://vgmpf.com/Wiki/index.php?title=Famicom/NES_Sound_Dri...
Idk about swapping assets but zsnes used to have a range of video filters that could improve the experience on a modern screen quite a bit.
Edit: For SNES, not NES, my bad.
You might like 3dSen, which came out several years ago. It does some pretty crazy stuff, converting NES games into essentially 3D voxel environments.
https://store.steampowered.com/app/1147940/3dSen_PC