I just got a Sony 55x900f (and I have a Razer Leviathan audio system), so I'm still learning what are my limits with this hardware.
Right now, whenever I want to control the volume, I have to stand up, approach the Razer Leviathan and press the buttons.
Is it possible to control the volume of my Razer Leviathan (that is connected via optical cable) by simply using the TV remote?
(I'm on Android 7, btw)
Try this