If you want to play music in the background during your live event, the easiest way is to play it through your phone, or wired/wireless speakers.
If you want to capture the computer audio directly, you will need to use third-party software like OBS or a physical mixer itself as our platform only supports 1 audio input.
Note: You will need to restart your computer after downloading. You can watch this YouTube video for a quick tutorial. Using OBS and livestreaming at the same time might be too taxing for some computers. The recommended RAM is at least 8GB. OBS is a free third-party software. If you'll encounter issues using it, it's best to check their help page here.
Here are other ways you can prepare for your session and some tips for when you're Live.