First off, if you haven't already, you should go to Dashboard setup if you haven't already setup your configuration.
- Open OBS and click on the
+button to add a new source.
- In the
URLfield, enter your Overlay URL. You can find this in the Sensitive Options section of the Dashboard Page.
- Check the
Control Audio via OBSbox.
Go to your
Advanced Audio Properties.
Audio Monitoringon your Browser source and set it to
Monitor (Mute Output).
Done! You should now be able to hear your audio in OBS.