Start with the free No Gameplay Demo from the official itch.io page. The developer explicitly warns that some microphones do not record in-game and says surround-sound setups may be involved; there is no confirmed universal fix.
Quick answer: test before changing everything
- Download the official No Gameplay Demo and try one short recording.
- Confirm the operating system can record from the same device.
- Temporarily choose a simple physical microphone as the default input.
- If only the game fails, record the game version, OS, device, and audio-routing setup for a useful bug report.
Officially documented limit
The developer says microphone recording failures have been widely reported and may relate to surround-sound audio setups or limitations in Godot's microphone features. That is an official warning, not proof that every failure has the same cause.
What general troubleshooting can establish
Windows permissions, the selected input, and the system input level can establish whether the microphone reaches ordinary applications. Passing that test narrows the problem to the game or its audio route; it does not itself repair the game.
Unknown and stop condition
If the demo fails with a known-good simple input after permissions are confirmed, this guide cannot claim a reliable local fix. Avoid buying the game solely to test the microphone; use the developer's demo and report the reproducible configuration.