You aren't softlocked if you save at 0 HP normally, as it sets you to like 0.001 health when you load in. You only get softlocked if something is actively killing you when you save at 0 HP, like radiation or bleed damage.
Maxwell's music being quiet after being found is intentional, because it could originally somewhat take away from the horror. Though, with the existence of The Funny Setting that unlocks similarly silly things that can also take away from the horror, it feels a bit obsolete now.
Viewing post in Voices of the Void 0.8.2 feedback
if you take enough damage to get killed you will probably be bleeding right after it, which will probably kill you when you go back. im speaking on experience, but yes, technically if you aren't bleeding or dying of radiation i guess you could survive it???? the only thing is that when i went to edit the save file so i wasn't dead, my hp value was at 0
my only concern about this is if the game autosaves when you're already dead or if you're bleeding when you're about to die. the game 100% shouldn't be able to be autosaved if you're dead and your screen is red and shit. what's more discussible is: if you should be able to save while dead, if the game should (auto)save things that could kill you once loaded (like bleeding), and if there should be any external system that would fix specifically this problem (as in a failsafe or something that prevents you from spawning already dead, or even something you can do in the load menu to unstuck yourself, at least without wiping your inventory)
or you can just get fucked and go back 10 or so minutes worth of progress L bozo shoulda saved every step you took