Volume slider doesn’t work with eARC/CEC
I have a setup with a LG OLED connected to a Denon amplifier, with sound mode on the TV set to ARC. I have also another LG OLED with a Lg sound bar connected with eARC. Both for TV native apps and sources going through Denon or Soundbar, volume changing through TV remote or through native HomeKit integration (remote from iOS control center, with physical iPhone buttons) correctly changes the Denon/Soundbar volume using HDMI-CEC integration, since the TV volume is disabled (sound mode is only ARC, so integrated speakers are disabled). With plug-in instead TV volume slider doesn't change anything at all, my guess is that it changes the TV internal speakers volume, but it's completely useless in my setup since they are disabled for both TVs. The plug-in should change the Denon volume through HDMI-CEC to be useful and also to be consistent with the behavior of the TV own remote (when sound mode set to ARC it changes the connected amplifier/sound bar through HDMI-CEC).