- Check FiveM's own voice settings, not just Windows. FiveM has a separate input device selection.
- Confirm your push-to-talk key. The default is N and it is easy to rebind by accident.
- Set your microphone as the Windows default input device.
- Give FiveM microphone permission in Windows privacy settings.
- If your voice is quiet in game but fine elsewhere, raise the input volume in the FiveM voice settings rather than boosting it in Windows.