Hey Garman! Not nosy at all, glad you like the tunes. Awesome that you dove into the genre, I love the Chiptune Baroque track. I could imagine slaying some vampires in an old castle to it xD. I can hear the rigidity that you mention, ties well into 8-bit imo.
As mentioned in my initial post, and my reply to exedexes, these are conversions of acoustic melodies, so just to curb your enthusiasm a bit they are generated in Suno. My old bandmate and I usually work in Cubase and GarageBand for our acoustic and alt. rock tracks (the sources of these chiptune conversions), but the chiptune versions are prompt-based, although heavily modified after an intensely fun day playing around with it.
Since we had such a blast with it, we did talk about if we should dig out our old synths from our respective storage units and re-recreate these conversions into "analog" versions. For now, I was just thinking they would be fun to share for free to indie devs to play with. As mentioned earlier, I'm not a professional or have any commercial interest, just an indie game nerd who would like to give back :P
Now that you mention DAW with plugins, it reminds me that we did try that once way back, must be at least 10 years ago, but I can't remember the names of those DSP plugins anymore (I'm old...).