LG CX (OLED65CX) 4K OLED TV Review & Comments

gunner84

Distinguished Member
The CX is more complicated than it should be:

Interal apps --> limited to ARC (i.e. Dolby Digital Plus Atmos is the best you will get)
External device--> all Dolby formats passed through eARC (inlcuding Dolby TruHD Atmos), but NO DTS tracks (DTS, DTS-HD, DTS-MA, DTS:X)
Depends though doesn't it, Apple tv 4k box for example, netflix, disney +, apple TV all offer atmos, but only using the DD+ codec.

Apart from DTS, I don't think the series 10 is any different from most TVs?
 

kiran_mk2

Member
All streaming services will always be lossy for the foreseeable future. Why tie up bandwidth with lossless audio when most people aren't set up to benefit from it? A UHD player connected to HDMI will pass through Dolby TruHD Atmos just fine but not any DTS format (Universal UHD discs used DTS:X). I did think this was going to be a big issue but again, streaming doesn't use DTS and Apps like Infuse on the ATV decode DTS-MA and below into multichannel PCM which will passthrough fine (just without lighting up the DTS logo).

Sadly most of the big 4 brands have now dropped DTS - I'm not sure though whether that includes DTS passthrough via eARC though.
 

gunner84

Distinguished Member
Just wondering why does my Denon say ATMOS when it plays off of Netflix internal app?

My Panny 902B used to say Dolby Digital.
Not really sure, I find it confusing as well.

Is your receiver Atmos?

I set my TV audio settings to passthrough to my Sonos ARC.
 

kenshingintoki

Distinguished Member
Not really sure, I find it confusing as well.

Is your receiver Atmos?

I set my TV audio settings to passthrough to my Sonos ARC.
yup it’s an atmos receiver.

I’m pretty much sure the tv does pass through atmos as its doing it for me using a traditional avr.
 

kiran_mk2

Member
Just wondering why does my Denon say ATMOS when it plays off of Netflix internal app?

My Panny 902B used to say Dolby Digital.
Atmos comes in two forms:
  • Atmos carried in a Dolby Digital Plus stream which is lossy
  • Atmos carried in a Dolby TruHD stream which is lossless
The first (lossly) version is what streaming services use and can be carried over ARC (and what the LG internal apps use) and the first (lossless) version is what is on UHD discsand require either a compatible amp/soundbar between the source and the TV or eARC support.
 

kenshingintoki

Distinguished Member
Atmos comes in two forms:
  • Atmos carried in a Dolby Digital Plus stream which is lossy
  • Atmos carried in a Dolby TruHD stream which is lossless
The first (lossly) version is what streaming services use and can be carried over ARC (and what the LG internal apps use) and the first (lossless) version is what is on UHD discsand require either a compatible amp/soundbar between the source and the TV or eARC support.

The Dolby Digital Plus passed through by my 902B was definitely not atmos (no height channel involvement and it said DD+ on the denon.

On the CX, it says atmos and involves heights.

I wonder why the panny couldn't pass through the DD+ with the height channel data :(
 

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