Originally Posted by wyld0
First thing I do whenever I get new electronics is update to latest firmware even before I start setting it up so that's a good call. I also disable CEC due to issues I've had in the past with Harmony and things getting screwed up from multiple control sources.
Yes, CEC sucks, but it can be used effectively in limited ways.
Comcast does not recognize Anthem branded equipment which means you can't use their nice X1 voice remotes directly to watch TV and get sound through your nice audio system. I have sorted out a way that works, but it does involve the dreaded CEC (and ARC.) I hope it is useful to others.
My system is: AVR (Anthem 1120), 4K TV (LG C7), STB (Comcast X1), Universal remote (Harmony hub) and other input sources (XboneS, OPPO 203, Roku...). Hookup is as follows:
Comcast STB-> TV HDMI non-ARC (Input 1 for me)
Anthem AVR-> TV HDMI ARC (Input 2 for me)
Other input sources -> AVR inputs
You must create an input on the Anthem that has no video and uses ARC-HDMI for audio. (This is Input 8 for me, retitled COMCAST.) Make sure all HDMI cables are good high speed ones.
CEC is fully turned on for TV and for Anthem, but for no other component. (If anything else has CEC turned on, weird stuff will happen.)
Set TV to output sound to ARC.
This way when the Comcast remote powers on the TV, the AVRwill turn on and will be set to the right input. When the power to the TV goes off, the AVR will go off. This way simple TV watchers can use the nice Comcast remote to do everything. In getting this to work, I seem to have to set certain audio and video features on the TV twice; I probably did them in the wrong order or something, but be prepared for that.
The Universal remote can be programmed to also do all othe TV stuff too but w/o the nice voice features; more importantly it is used for any non-TV sources. So when playing e.g. a 4K disk, I use my harmony with the AVR as the hub.
Using ARC for the TV sound means that nothing better than 5.1 sound get transmitted, but that only affects Comcast and they do not have any sound better than 5.1. For 4K disks and ROKU streaming, which do have some atmos content, the sound goes to the AVR first and so there is no loss.
CEC is not implemented in all TVs the same way. My LG version (called SIMPLELINK) handshakes with the Anthem quite well, others may not. So far I am a happy camper, but any software update could mess me up.