We have Amazon fire stick plugged into HDMI 1, and the audio set to "Dolby Digital Plus Off." The TV volume works great for all other Apps on the fire stick (for example, if we watch a movie on Amazon Prime) but it is very quiet with the Slingbox app. We have to turn the TV volume to MAX to hear anything, and even then, it is barely audible. Can someone please help us resolve this very frustrating issue? thanks in advance!!