Computer/browser audio playing while streaming game

[Raiksha]

Hello i recently decided to start streaming league of legends and i have installed obs, i created a setup that works decently and i managed to create some scenes to stream a game (league of legends). The only issue is that whatever sound comes from my pc, be it a window's sound or me playing a video on my browser, can be heard on stream. How do i make it so that only the audio from the game and the audio from my microphone can be heard on stream? Also if i were to create a different scene to show only the browser, can i make it so only the audio from the browser (and my voice) plays on stream?
I tried looking up this issue online but i couldn't find anything, maybe i cannot find the right keywords to use.
Forgive my imperfect english

 

[koala]

This is a common challenge. Instead of recording "Desktop Audio", which contains every audio mixed by Windows, you need to separate (or split) audio and tap it before it gets mixed by Windows. Common search terms are "obs split audio" or "obs separate audio".

There are two approaches. Many apps/games can be configured to output their audio to a specified Windows audio device. For this to work, you install a virtual audio device (for example vb-audio virtual cable) and configure the game to output its audio to the virtual device, and OBS to record that virtual device instead of your default Desktop audio speaker device. To still hear audio in your speakers, activate the "listen to this device" option in the virtual audio device properties.

For games that don't allow specifying an audio device, you can use Windows 10 functionality to redirect audio to a device you specify: https://obsproject.com/wiki/Windows-10-App-Volume-Device-Preferences
But this works somewhat unreliably.

The other approach is a plugin:

win-capture-audio

An OBS plugin similar to OBS's win-capture/game-capture that allows for audio capture from a specific application, rather than the system's audio as a whole. This eliminates the need for third-party software or hardware audio mixing tools that...

obsproject.com

It allows you to directly capture any app just like game capture. It's much easier than the virtual audio device approach and doesn't need a virtual audio device, however it's rather new and beta.