As far as I know, you need a mic in order to finish the last loop for the second baby laugh. Can I suggest a workaround for people like me that doesn't have a microphone? Like an accessibility option
That's a great idea, just like how Sam in *Death Stranding* has a dedicated button for calling out. But since this is part of the original game's puzzle mechanics, I might try introducing new gameplay mechanics to trigger the laughter instead of a one-button trigger.