Welcome to this guide, it’s the shortest one I promise 😄.
- Go to the advanced audio settings

- Keep the audio track 1 enabled for all sources, the same goes for audio track 6 but make sure to disable audio track 6 for the “Music/Browser Audio” source where you gonna be playing Copyrighted Music.

Finally, go to Settings → Output → Streaming, Select 1 for “Audio Track” and Select 6 for “Twitch VOD Track”.

TIP: In case you can’t see the Audio Tracks, you can simply go to Settings → Output → Recording and enable the audio tracks by clicking on the numbers.

Make sure to take a look at these additional important guides
Scheduling Streams on Metaguild Google Calendar
Stream Announcement/Promotion Guide
Host/Raid Guide
Tips and Best Practices for Streamers