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Contributor I
August 26, 2026
Answered

PCM stereo on Panasonic UB-820 with Arc Ultra

Hello, I take the liberty of asking you because I have a fairly well-known problem that I can't solve.

I bought a Sonos Arc Ultra and 2 Era 300 and here is my equipment:

-LG OLED 65C1

- Panasonic UB820 Blu-ray Player

-PS5

-Apple TV 4K

On my Panasonic UB-820 player, Dolby Atmos and Dolby Digital work perfectly but DTS-HD does not convert to PCM 5.1, it is indicated in PCM Stereo!

My PS5 can convert DTS audio to LPCM 5.1, and it sounds great!

Can anyone help me with this problem? Thank you.

BoystickAnswer
Contributor I
August 27, 2026

The problem that it’s work with my PS5 with have the multichannel !

 

I think the problem is between the LG C1 and the UB-820

14 replies

Prodigy II
August 27, 2026

The last bit is interesting. The TV should report its capabilities via CEC.  Might try mine. 

"I saw the Stooges and the MC5"
Prodigy II
August 27, 2026

I forgot the G4 has support for DTS so I couldn’t test it properly but people might want to check they get LPCM 7.1 from DTS-X tracks. It seems to have a slightly wider sound stage but perhaps it’s just my imagination as it’s subtle. 

"I saw the Stooges and the MC5"
buzz
Grand Maestro
August 27, 2026

I have no experience with this TV. In general, I think your chance for success is higher if you disconnect everything from the TV, including the soundbar, then reboot both the TV and soundbar. After the TV and soundbar finish rebooting, make sure that CEC (or whatever it’s called on your TV) is enabled. Next, connect the HDMI cable between TV and soundbar and allow them a couple minutes to share data.

Now you can start connecting other devices to the TV. I recommend connecting a device, then verifying that it works as expected before connecting the next device. Some devices are a big pain because they assume that they should be in charge and they’ll attempt to override other devices. If you discover a device is causing issues, you can add a “CEC Blocker” in the HDMI cable for that device. While this will block some convenience features, such as automatic power-up and input selection, it will prevent the rogue device from interfering with the operation of other devices.

buzz
Grand Maestro
August 28, 2026

One additional detail: Some TV’s will not immediately reboot when power is removed. I recommend keeping the TV powered down for at least two minutes.