How do I record in game audio only?

The steps are as follows:

1. Get OBS and install it if you haven’t done so already.
2. Launch OBS.
3. Go to “Capture Settings.”
4. Select “Desktop Audio” and set it to default.
5. Disable other audio sources if you wish.
6. Set the output file settings to an easily convertible video file.
7. Choose the audio bitrate levels.