Seems like a good game being worked on by a passionate dev. The one thing that should work for anyone who plays this game is the audio in/out and it doesn't. Wait to buy this until the solution isn't gonna send you on a crusade across the internet. Crazy that this is in 0.4 and its still an issue.
I agree, it is crazy that this is still an issue. But it's one I cannot fix myself because it's an issue with the Godot Engine itself; it's very likely due to the issue described in this pull request: https://github.com/godotengine/godot/pull/92532
I believe a fix will be added for Godot version 4.5, which is being worked on, so ideally that will fix it for Choicer Voicer as well, whenever I move the project to Godot 4.5