FireTV 4K not playing Dolby TrueHD yet the same Movie plays correctly on Shield ATV?

[Rew452 15]

Hi All

 

I recently added a FireTV 4K stick to get Dolby Vision but I just noticed that while playing some movies with Dolby TrueHD sound tracks it plays back in Dolby D+ and I cannot get TrueHD sound. ATMOS also plays correctly.

 

I can play the same movies on my Shield ATV and I get TrueHD.

 

Is this some limitation of FireTV? Or?

 

I have a Denon x4300h

 

Thanks

Rew

 

[ebr 16184]

Hi.  The Fire platform does not support TrueHD (or DTS of any flavor).

[Rew452 15]

Thanks, I kinda thought so but could not find any info.

 

Rew

[Tupsi 4]

Hi.  The Fire platform does not support TrueHD (or DTS of any flavor).

 

Is Dolby Atmos != TrueHD? I always thought thats the same stuff? Just asking because according to the amazon device specs page, the latest 4k stick supports (at least) Atmos.

 

https://developer.amazon.com/de/docs/fire-tv/device-specifications.html

[CBers 7450]

Atmos is a Dolby product, whereas DTS is a DTS product.

 

TrueHD is Dolby's version of DTS's DTS-HD.

[Tupsi 4]

Atmos is a Dolby product, whereas DTS is a DTS product.

 

TrueHD is Dolby's version of DTS's DTS-HD.

 

I know the difference between Dolby and DTS ;-) Was just confused about Atmos/TrueHD and that you have not cleared up.

 

I am still confused, because when I look up a file here which has atmos as one of the audio tracks and check that with mediainfo I see something like this:

 

Audio #2
ID                             : 3
Format                         : TrueHD
Format profile                 : TrueHD+Atmos / TrueHD
Codec ID                       : A_TRUEHD
Duration                       : 2 h 16 min
Bit rate mode                  : Variable
Bit rate                       : 4 420 kb/s
Maximum bit rate               : 7 794 kb/s
Channel(s)                     : Object Based / 8 channels
Channel positions              : Object Based / Front: L C R, Side: L R, Back: L R, LFE
Sampling rate                  :  / 48.0 kHz
Frame rate                     : 1 200.000 FPS (40 SPF)
Compression mode               : Lossless

which let me to believe that TrueHD IS just another marketing word for Atmos.

 

ok, so I just googled that myself. Atmos is used in both lossless (TrueHD) and lossy (DD+) ways. So it is not Atmos = TrueHD. TrueHD itself just refers to the lossless part. Atmos seems to refer to the whole "object based" shit relative to the old stream/channel way.

Edited March 22, 2019 by Tupsi

[ebr 16184]

Correct. Atmos is an extension that can be added to either TrueHD or DD+.  It is usually seen on THD tracks.