Hello everybody,
as my last TV died a few days ago, i got the LG C1 48" on a bargain.
I already read about some glitches with LG TVs (Choosing Bitstream instead of PCM, etc.), but discovered an issue maybe some of you can comfirm and have a solution for - i think it's some kind of bug in the LG TV firmware:
My problem is that the LG TV is not able to reliably pass through 5.1 LPCM from a PS5 to my AVR, i.e. I can easily reproduce a scenario where passthrough of uncompressed PCM does not work anymore - when changing input sources.
My Setup:
TV Streaming Box is connected to HDMI 1 on the LG.
My eARC capable AVR (Canton SmartAmp 5.1 Gen2) is connected to HDMI 2 (ARC) on the LG.
My Playstation 5 is connected to HDMI 3 on the LG.
Settings LG TV: Audio output via HDMI(ARC), Bitstream, Passthrough, eARC activated.
Settings TV Streaming Box: Audio Output Bitstream Dolby Digital (as it's the only option besides Stereo)
Settings PS5: HDMI Device Type set to AV Amplifier, Number of Channels set to 5.1., Audio Format (Priority) set to Linear PCM.
Problem/Scenario:
Setting everything up from Scratch in the above configuration with the PS5, everything works as expected: the AV amps Display is showing "Multichannel PCM Direct", all 5 Speakers play the intended Surround Sound (verified by Turning the Camera around a camp fire in a game).
When changing the input source to the TV Box watching TV, at first everythings normal - "Dolby Digital" is shown in the display of the AV amp - as configured in the settings. But changing back to the PS5 is where the Problem kicks in:
LG C1 is not able to switch back from the TV Box's Dolby Digital to the PS5's LPCM and passing it through via eARC to the Amp anymore: all speakers remain silent, as the amp does not get an audio signal at all. Switching to Dolby Digital 5.1 in the PS5's settings i can get surround sound back, switch back to LPCM in the PS5 the speakers remain silent again.
I can reproduce this.
To reset this, disconnecting HDMI and power plugs from the TV is sufficient, Multichannel PCM is working again after reconnecting - as long as i don't switch to an input with an compressed audio source.
????
Can anybody confirm this scenario? Is this a bug in the TV? All devices have their actual firmware updates.
????
My Workaround at the moment is setting the PS5 to Dolby Digital, as there is no problem after switching input sources with this. This is absolutely not ideal, but works. But there must be a way to output uncompressed multichannel PCM in a reliable manner, somehow, as the HDMI specs of all connected devices are supporting eARC.
Please excuse my language, as i am not a native english speaker.
as my last TV died a few days ago, i got the LG C1 48" on a bargain.
I already read about some glitches with LG TVs (Choosing Bitstream instead of PCM, etc.), but discovered an issue maybe some of you can comfirm and have a solution for - i think it's some kind of bug in the LG TV firmware:
My problem is that the LG TV is not able to reliably pass through 5.1 LPCM from a PS5 to my AVR, i.e. I can easily reproduce a scenario where passthrough of uncompressed PCM does not work anymore - when changing input sources.
My Setup:
TV Streaming Box is connected to HDMI 1 on the LG.
My eARC capable AVR (Canton SmartAmp 5.1 Gen2) is connected to HDMI 2 (ARC) on the LG.
My Playstation 5 is connected to HDMI 3 on the LG.
Settings LG TV: Audio output via HDMI(ARC), Bitstream, Passthrough, eARC activated.
Settings TV Streaming Box: Audio Output Bitstream Dolby Digital (as it's the only option besides Stereo)
Settings PS5: HDMI Device Type set to AV Amplifier, Number of Channels set to 5.1., Audio Format (Priority) set to Linear PCM.
Problem/Scenario:
Setting everything up from Scratch in the above configuration with the PS5, everything works as expected: the AV amps Display is showing "Multichannel PCM Direct", all 5 Speakers play the intended Surround Sound (verified by Turning the Camera around a camp fire in a game).
When changing the input source to the TV Box watching TV, at first everythings normal - "Dolby Digital" is shown in the display of the AV amp - as configured in the settings. But changing back to the PS5 is where the Problem kicks in:
LG C1 is not able to switch back from the TV Box's Dolby Digital to the PS5's LPCM and passing it through via eARC to the Amp anymore: all speakers remain silent, as the amp does not get an audio signal at all. Switching to Dolby Digital 5.1 in the PS5's settings i can get surround sound back, switch back to LPCM in the PS5 the speakers remain silent again.
I can reproduce this.
To reset this, disconnecting HDMI and power plugs from the TV is sufficient, Multichannel PCM is working again after reconnecting - as long as i don't switch to an input with an compressed audio source.
????
Can anybody confirm this scenario? Is this a bug in the TV? All devices have their actual firmware updates.
????
My Workaround at the moment is setting the PS5 to Dolby Digital, as there is no problem after switching input sources with this. This is absolutely not ideal, but works. But there must be a way to output uncompressed multichannel PCM in a reliable manner, somehow, as the HDMI specs of all connected devices are supporting eARC.
Please excuse my language, as i am not a native english speaker.