The crossfader allows you to balance the hero feed volume against fan chatter. It’s likely that your crossfader is set all the way to fan chatter.
Using the crossfader:
Locate the crossfader in the lower-left corner of the screen. The centre dial controls which audio you want to prioritize. Slide the dial toward the music note to hear more of the hero feed audio. Slide the dial toward the fan icon to hear more from the fans around you.