I recently got 2 miboxes. One used in bedroom straight to TV. The other is connected through my Denon AVR1713. I have Andorid IEC passthrough set for both options in the audio settings on this box. First when I set this it switches to DTS, Dolby etc. on the AVR as expected but if I volume down on the mibox remote I get nothing but static. I get pure static with the volume anything lower than 100% on the mibox remote. So in the mibox settings I changed some HDMI setting I forgot what exactly and now I don't get static on DTS/Dolby when I volume down but also the volume doesn't work at all from the mibox remote, it does when I'm on Netflix or any movie using Pro logic.

Any ideas what settings I could change to allow the mibox to passthrough DTS/Dolby as it is now but also have the mibox volume control work as well? Do I need to look at enabling hdmi CEC on the AVR perhaps?