Godot audio recording not working

Godot Version

Godot 4.4.1 stable running on Windows 11.

Question

My project needs audio recording and I’ve set the Project Settings and Audio Buses according to This document .

Here is my minimalized project.

Unfortunately, it is not working properly on my computer. I have tried it on two different computers using Godot 4.4.1, and the recorded wav has the file size but no sound. I even downloaded the Godot official demo project, but still can’t get the correct wav. What should I do? My project really needs recording.

PS: I found that the microphone privacy setting can show what program is occupying the microphone. When I tested my project and the Godot official demo, it didn’t show that it was being called, but if I directly turned the Playing of the AudioStreamPlayer with the Stream as AudioStreamMicrophone to true in the editor, it showed that Godot was calling the microphone.