3 ms·
This is what HDMI CEC[1] is for, right? The devices are supposed to coordinate on which device will output audio (TV, sound system, etc.), and they are suppose
by adrianmonk 6y ago
This is what HDMI CEC[1] is for, right?
The devices are supposed to coordinate on which device will output audio (TV, sound system, etc.), and they are supposed to send control signals (volume up, volume down, and mute button presses) in a channel over the HDMI connection so that whatever device is playing audio can adjust its volume.
Of course this assumes all devices involved implement CEC (which is optional) and that the implementations aren't full of bugs. But the point is HDMI does have a solution for this in theory.
CEC is how I can punch the volume control on my Samsung TV remote and the volume on my Denon AV receiver changes. (And it's not the TV remote transmitting IR to the receiver. Within the first 5-10 seconds of powering on, pushing volume up on the TV remote makes the TV try to adjust its own volume even though it's not playing audio. Then it comes to its senses and realizes it should be forwarding that via CEC.)
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[1] https://en.wikipedia.org/wiki/Consumer_Electronics_Control https://en.wikipedia.org/wiki/Consumer_Electronics_Control
- voltagex_ 6y agoWhereas if you'd bought an LG TV you'd punch the volume control and nothing would happen on the Denon. Both devices claim to support CEC. With an older Sony TV, only some CEC messages worked (I think enough for a Chromecast to be able to switch the active input). I think they forgot the "consumer" part of "consumer electronics control".
- brokenmachine 6y agoI have a Denon AVR and an LG TV and the TV controls the volume on my AVR. I have experienced the pain of broken CEC with my previous Hisense TV though.
- adrianmonk 6y agoYeah, I don't know if it's my AVR or TV's fault, but every now and then the TV spontaneously becomes unable to control the AVR. I've never been able to pin down the exact steps required, but through some combination of power cycling things, unplugging HDMI cables, and redoing setup menu stuff, it starts working again. It really takes away from the appeal of a convenience feature if it requires periodic battles to beat the equipment into submission.