No “sound” nor “music” nor “dsp” nor anything I can use for audio tag. “Audio” is already allocated to podcasts.
I’d propose a new tag on meta, but I already have an emulation tag proposal in there which, so far, seems to have gone nowhere.
Sounds a good idea, so I made the request https://lobste.rs/s/724dnb/tag_request_sound
FWIW I’d say that “art” and “historical” describe it pretty well.