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LG UM7100PLB + Sonos Beam 2 + 2 x SL + PS5 audio on LPCM is lower than on Dobly/DTS

  • April 8, 2022
  • 8 replies
  • 420 views
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Hi guys,

These past days I managed to finish building this set up.

My settings: Beam 2 is plugged into the eARC HDMI port, PS5 is plugged in into the standard HDMI port.

eARC output is enabled with passthrough. AV Sync Adjustment is turned on with Bypass on. DTV Audio Settings is set to Auto.

The HDMI input is set to Bitstream.

In the PS5 settings, I set the output to Soundbar.

Even though in the Sonos app I get PCM Multichannel 5.1, the output is really low on LPCM. And by this I mean that most of the sound comes from the Beam (center and the other channels) while the SLs barely have some sound. On DTS/Dolby it's louder and it feels like surround.

I enabled True Playtuning.

Thanks!

Best answer by ddiaconu21

 

So the solution would be not to use LPCM on the PS5? How would that be achieved? Would it really be so bad?

It can be achieved in the PS5 menu. I was just wondering why uncompressed sound was “less” than Dolby/DTS

 

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8 replies

106rallye
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  • 106rallye
  • April 8, 2022

In the PS5 settings, I set the output to Soundbar.

Is there another setting you could try?

D
D
  • ddiaconu21
  • Author
  • Contributor I
  • April 8, 2022

In the PS5 settings, I set the output to Soundbar.

Is there another setting you could try?

AV amplifier if I recall.

D
106rallye
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  • 106rallye
  • April 8, 2022

What happens if you choose this?

 

Edit: I've just checked. Mine's set to AV-Amplifier - but my Beam's a Gen 1.

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  • ddiaconu21
  • Author
  • Contributor I
  • April 9, 2022

 

What happens if you choose this?

 

Edit: I've just checked. Mine's set to AV-Amplifier - but my Beam's a Gen 1.

Same story sadly.

It seems that in the official documentation the TV HDMI port is catalogued as ARC, while in the TV menu it’s eARC.

Maybe that is the issue?

 

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  • ddiaconu21
  • Author
  • Contributor I
  • April 9, 2022

It’s 100% an ARC port, not a eARC one.

J
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  • jkossis
  • Enthusiast I
  • April 9, 2022

@ddiaconu21 unfortunately, this has been a well-documented issue with Sonos’ implementation of LPCM (for both the Beam Gen 2 and Arc). There are countless reports and calls for this to be fixed, but sadly, it doesn’t seem like Sonos really cares that they released a half-baked implementation that affects a large market share of their users (Apple TV, PS5, XBS/X, etc.).

https://www.reddit.com/r/sonos/comments/qtyn34/sonos_and_lpcm_low_volume_still_a_thing/

 

https://www.reddit.com/r/sonos/comments/sfvm5c/lpcm_still_low_volume/


https://www.reddit.com/r/sonos/comments/jry9gf/lpcm_volume_is_much_lower_than_bitstream_on_xbox/

 

https://www.reddit.com/r/sonos/comments/k2ijxs/lpcm_volume_on_arc/
 

Don’t believe folks from Sonos who claim that LPCM is naturally softer, as it has a greater dynamic range than a lossy format (such as Dolby Digital). While it does have a greater dynamic range compared to a lossy format, it doesn’t explain why it is softer than a similarly lossless format (such as DTS HD-MA or Dolby TrueHD). It bit-for-bit should be the same and sound the same. Regardless of who (device or Sonos) is doing the decoding to LPCM.

D
106rallye
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  • 106rallye
  • April 10, 2022

So the solution would be not to use LPCM on the PS5? How would that be achieved? Would it really be so bad?

D
D
  • ddiaconu21
  • Author
  • Contributor I
  • Answer
  • April 10, 2022

 

So the solution would be not to use LPCM on the PS5? How would that be achieved? Would it really be so bad?

It can be achieved in the PS5 menu. I was just wondering why uncompressed sound was “less” than Dolby/DTS

 

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