hearing the sound while playing the level using steamVR "Display VR View"


I need to click on the “Display VR View” window to make it full screen to let other people see what I am playing, but when I enlarge the “Display VR View”, the HTC Vive headset just loss the sound, I know this is the reason because of I activate the “Display VR View” and the actual VR executable is not in active window.

How can I overcome this? Sorry for my bad English, I hope you guys understood what I am saying, and thank you very much.