Unity PC VR - Keep PC Audio active when headset is asleep

Hi, I am developing an interactive installation in Unity 2020.3.25f1 for a Quest 2 in PC VR mode. 

My project has two cameras, one for the headset and one that is used by a video projector. I've enabled PC audio in the oculus app so that there will be audio on the second display, but there are times when the headset will be inactive and currently this deactivates the PC audio. I've tried switching my audio listener to the non-vr camera but that doesn't have an effect. I'd like the audio to continue on the projected display when the headset is inactive. 

Please let me know if you have any suggestions,

W