@aeva
https://aivisura.bandcamp.com/album/meanwhile
I don't know if you are aware if this album which mix piano and chiptune.
I wouldn't worry too much about mixin mandolin and chiptune. It's two things you like and you try to make then work. Unless you don't like how they sound together or want to explore refining the sound of one, you can simply use them together

9 track album
@aeva i'm not sure if it would give you any particular inspiration, but i submit local heroes Foggy Mountain Spaceship (findable on youtube and probably other stream-y services) for an example of something that's mixing traditionally acoustic instrumentation and electronic sounds quite handily.
(they have the advantages of being virtuoso long-time string band weirdos, and of banjo's being pretty amenable to being space-ified, but still.)

@aeva YO. Mandolin and dulcimer and similar in chippy electronic is fucking great.
Some of the EVE Online score does that and it's DELICIOUS.
(Shitty game. Great music.)
@ireneista @aeva Like this is a thing that happens in more Muppet movies than not, I'm pretty sure.
By analogy the music thing sounds cool also.

13 track album
@aeva @bytex64 this feels like a thing that is impossible to figure out without trying. Like maybe it rules? or maybe it doesn't? I actually feel like specifically a hurdy gurdy could work
like it fits real well into dark sounding techno beats https://www.youtube.com/watch?v=6msesBTcuNM so why not?

the main problem you will have is sort of the same problem you get trying to blend acoustic instruments with distorted electric guitar. the guitars have an overwhelming amount of high frequency content and it's hard to hear anything else playing at the same time. unfiltered chiptune waveforms are even brighter. so you have to build your arrangements around dealing with that (folk metal is a good example)
Master Boot Record. Driving heavy metal with chiptunes in the mix. Also see their side project Keygen Church, which substitutes pipe organs for chiptunes.

15 track album