To troubleshoot and fix OneNote audio recording not working, here are some suggestions:

1. Make sure you have the latest version of OneNote installed


2. Check your audio device settings in OneNote


3. Check the audio device settings in Windows


4. Check the sound settings in your Windows sound system


5. Test the microphone to make sure it’s functioning properly


6. Check your microphone volume setting in Windows and in OneNote


7. Perform a system restart and test OneNote audio recording again