I have also the sonos arc and the lg g1, this worked for me (i have this from another forum)I've recently received my LG G1, hooked up to Sonos ARC soundbar. I'm struggling to get anything but PCM 2.0 stereo to the sound bar no matter what I do. I am plugged into eARC HDMI port 2 on the G1, and I've tried Dolby 5.1 sources, Atmos sources TrueHD sources but they all report in the Sonos App as PCM 2.0 stereo.
Reaching out in case anyone else has had this issue and knows how to correct it!
Thanks for the help!Changing the cable between TV and soundbar seems to have fixed my issues. Might be too early to tell but we will see. I used two other cables tonight and it all seems fine.
Watched Game of Thrones season 2 episode 9 on 4k Blu-ray with DV (the one with the wildfire) absolutely beautiful scenes on this TV, a bit of football from virgin go from my pc and Doom Eternal on Xbox series x (so wonderfully colourful in HDR) and not come across the issue at all and Atmos passed through perfectly so fingers cross.
Usually got the issue within half an hour of use with digital sound out pass through setting before.
You need to set the following settings I think:
HDMI Input Audio Format: Bitstream
Digital Sound Out: Passthrough
eARC: On
Along with Bypass on the audio sync setting (can't remember the name of it, not at TV ATM) but I don't think this is necessary.
There may be things you need to enable on the Sonos side too perhaps?
I just realised that Dolby Atmos movie playing through the LG Plex App is transcoding TrueHD which seems to be the issue.Thanks for the help!
I enabled eARC, and Passthrough on the G1 now I am getting things like Dolby Digital Plus 7.1 appearing on the sonos app.
I still don't see Atmos logo appearing so I have a couple of questions.
Does the G1 display an Atmos logo when it first starts playing Atmos content?
Should I be seeing Dolby Atmos tag appearing in Sonos or is it fine when it just shows Dolby Digital Plus 7.1?
Also if you have a reference to an actual known Dolby Atmos test video I'd love to try that![]()
How you finding the G1 mate? I've got a c8 now, g1 on order but I'm thinking of cancellingCame from a C8 to G1 without those issues. Probably doesn't help sorry.
I'd try a different cable of you already haven't.
I just realised that Dolby Atmos movie playing through the LG Plex App is transcoding TrueHD which seems to be the issue.
If I try the same movie on Nvidia Shield -> G1 then I get Dolby Atmos encoded audio appearing in Sonos.
I'm assuming then that TrueHD decoding is not possible on the LG Plex App.![]()
Apologies for being a little off topic but those of you that have upgraded from C7 and have an Xbox Series X, did you have any hdmi issues using the console with C7?
I ask because I occasionally get white flashing pixels running diagonally across my screen when switching to HDR content.
Backing out to the Home Screen and then going back into the game usually sorts it, as does unplugging and plugging back in HDMI cable.
I tested the console on another tv for an hour and it seemed fine but I’m still concerned it could be a dodgy console rather than the tv.
I’ve tried a lot of troubleshooting with Xbox support, trying different cables and all that.Came from a C8 to G1 without those issues. Probably doesn't help sorry.
I'd try a different cable of you already haven't.
Actually it was a very silly as well as simple solution which took me a while to figure out. I am new on LG as well as on WebOS but long story short if the setting is lined up on LG Sync, the option for choosing the specific output on Optical is grey out thus you have to untick the LG sync so you can choose whichever output you need....Have you changed the tv output to bitstream?
The HDMI cable change didn't end up working long term and still continued. I found other people had similar issues with last couple of years oleds with various external sound devices. Advice seems to have heen to switch off Quick Start+ so I turned both that and HDMI-CEC (with Logitech Harmony I don't need it anyway) off and all seems well.I notice you have the same soundbar, would you happen to have the latest consoles, namely the Xbox Series X?
If so could you please check the TV and Display settings and let me know if VRR and ALLM is highlighted or greyed out when passing through the sound bar?
Are you also running everything into the (3xinputs) Soundbar then eARC to TV eARC?
Checked agin and Sharpness isn’t increasing, but color depth is going back up to 55.Are you supposed to set the color temperature back to Warm 50 in HDR and Dolby Vision? I did that for SDR in Filmmaker and Game Optimizer but it automatically adjusts it to 0 in HDR/DV. I’ve read in some places that you aren’t supposed to adjust the settings that it changes when switching, but that just seems odd to me. Pretty sure I saw Dolby Vision upped the Sharpness to 20 as well, but I couldn’t swear to that.
Have you changed the tv output to bitstream?
Denon are a really good brand. I used to use Onkyo as they were better but something changed with them and they weren't as good any more. Got a Denon and its been brilliant. Only thing like you say is watch out for HDMI 2.1 compatibility. I know a lot of the early chipsets had issues (same with other manufacturers). I haven't heard about the free box to fix it but I think their newer boxes are fine. Worth researching which is sounds as though you have.Actually it was a very silly as well as simple solution which took me a while to figure out. I am new on LG as well as on WebOS but long story short if the setting is lined up on LG Sync, the option for choosing the specific output on Optical is grey out thus you have to untick the LG sync so you can choose whichever output you need....
Ok while I am here I am asking something else. I bought the G1 mostly for the playing games with next gen console [PS5/Xbox X] but at the same time I was looking to upgrade my home theater system. I am looking for Denon X4700 which is implementing the most of the next gen console features like VRR and so on, is anyone here experience with Denon and let me know if there are any issue? I know they are releasing for free an external box due to an issue on HDMI 2.1 chip failing against HDCP protocol
How is the Upscaling from c8 to g1? I really hate the upscaling on the C8
How is the Upscaling from c8 to g1? I really hate the upscaling on the C8