My Pinnacle 38FLSA has the Furrion DVD and 60 inch TV. I too wanted my AppleTV, XboxOne and CABLE TV to come out the ceiling surround speaker system.
THE FIX IS VERY EASY.
Step 1) Get an HDMI router on Amazon. $34.00
Step 2) The Furrion DVD is plugged into the TV's HDMI port #1, remove that and plug it into Port #1 on the HDMI router.
Step 3) Plug the rest of your gear into the HDMI router.
NOTE: If you need more than 4 HDMI ports then buy an 8 port HDMI router.
I plan to upgrade my 4 port to an 8 port. You can also plug a 4 port into the other 4 port but you end up with 7 ports for gear.
Then you use the HDMI router Remote control to choose WHICH HDMI router PORT to use. Example: AppleTV, CableTV, XboxOne, Furrion DVD.
Now ALL audio comes out of the ceiling surround speaker system!
I notice distortion and various types of audio buzzing with different content and systems. But in all honesty I notice it more playing DVD discs and surely the Furrion DVD amplifier does NOT rival a $1000 Yamaha surround amp. Still, you will enjoy jacking your gear into the ceiling.