I asked a streamer if he could show me the options menu. There were 4 categories for options (HUD, parameter, social and a fourth one I forgot). I know a bit of Japanese and there were no audio options, unfortunately. The parameter settings only contain
options for the camera.
Yeah, I'd also like to turn the music off. It's not because of the vocals, but some pieces contain elements that just make me facepalm as a composer: poor loops (just silence at the end and then it repeats from the beginning), atonal melodies (e.g. character creation theme: no, this doesn't sound futuristic, it's just terrible), cheap copy/paste-samples (that atrocious NLA night theme) and rhythm that is all over the place (e.g. night theme of the first area: seriously, why does he put a snare on 2 and 4e and not on 2 and 4? No exotic music uses this and it just ruins the beat).