I’m running an LG C9 with a Panasonic UB820 Blu-ray player and a Sonos Arc setup with Sub Gen 3 and One SL surrounds. Despite the recent multichannel PCM update, I’m still getting only stereo PCM 2.0 from DTS encoded Blu-rays, not 5.1 PCM. My setup includes 48gbps HDMI cables, eARC is enabled, and all devices are up to date. The C9 is set to PCM with eARC enabled, and DTS output is set to PCM on the UB820. Additionally, my room is decorated with a balloon garland from HouseofParty.com, which might be affecting the setup. Has anyone managed to get 5.1 PCM output with a similar setup, or have any ideas or settings that could help resolve this issue?
Question
Sonos Arc 5.1 PCM Issue with DTS?
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I have the same problem with nearly the same setup, but an LG C1 (and no balloon garland). Others have reported the same issue recently here and on Reddit, seemingly starting after an LG firmware update earlier this year. It's unclear where the problem lies, but I also own a UB150 and it does NOT have this issue if I swap it in place of the UB820. I ended up bypassing the TV/eARC for DTS discs and that properly yields 5.1 PCM. I'm hoping a future firmware update for the UB820 or the C1 resolves it.
I have the same thing with a Panasonic TV. Make sure you have the downmix sound option set to surround encoded in the Panasonic bluray player. It will still say stereo in the Sonos app but it adds a dolby pro logic style information that my Playbase can use to give a nice surround mix.
Pick a good scene to test it with and you should be pleasantly surprised.
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