Have you bothered reading this topic before posting?
The only beta that addresses DTS-HD fixes (they incorrectly named it DTS:HD) is Plex for Android 9.14.0.37678-beta, which is where the last 10 posts are about.
Plex for Android 9.14.0.37756-beta should fix the TrueHD version which they broke in the previous beta.
The newest beta, Plex for Android 9.14.0.37777-beta, doesn’t mention anything about DTS-HD, so I haven’t tried that yet.
I guess it isn’t clear the last few posts are about results using the posted betas, I really want the passthrough to work, it means a lot to me.
The newest beta addresses, TrueHD passthrough. It came out 1 day ago. I was hoping it would fix whatever is holding up DTS MA as well since it was supposed to work 2 betas ago. I was also hoping for confirmation that the TrueHD part worked now since that also didnt seem to work.
After trying DTS-HD on the Cube 3rd Gen it appears to be coming through to my AVR as DTS 5.1, I’ve looked through what we do and we aren’t modifying the DTS stream in anyway so it looks like the device itself is dropping out the extra channels, as far as the Plex app believes it’s passing through and playing DTS-HD with 8 channels.
If that’s the case, KODI wouldn’t be able to passthrough DTS-HD either, right? But it works flawless with KODI.
Kodi doesnt use the Android stack for passthrough so they can handle more formats that might not be supported by the Android device itself.
AFAICS there’s not been any beta update since I mentioned that setting frame rate matching breaks playback. Is that being investigated/fixed?
It’s unfortunate to hear about the DTS-HD findings but not really surprising since the specs refer to it as DTS-HD (basic profile) and I don’t know what “basic profile” means, perhaps it actually means the DTS core only is passed through …
So is this a temporary solution for playing dts files on 3rd gen fire cube? Use a Kodi add-on that interfaces with PMS?
AFAICS there’s not been any beta update since I mentioned that setting frame rate matching breaks playback. Is that being investigated/fixed?
Are you referring to refresh rate switching inside the Plex app? If so, this is still being investigated.
That’s not really a solution, AFAICT Doly Vision is still not working in Kodi and plugging the Fire TV into a port on my eARC capable Sony TV breaks pass through almost completely while this does work fine for an Nvidia Shield (so it is meant to work).
I tried the latest beta and reverted to the AppStore Plex and re-tested.
Basically, enabling match frame rate in Plex causes any DTS playback to stall frequently while Dolby passes through ok, including TrueHD and TrueHD Atmos. Turning off match frame rate in the Plex app allows all DTS (DTS, DTS-HD amd DTS:x) tracks to be passed through as the DTS core only and seems to work ok so far.
So the beta Plex app isn’t much different to the current public Plex app.
DTS-HD works fine for me, but not TrueHD.
You talk about adjusting frame rate, pretty sure I read somewhere not to use that on firecube or it conflicts with the firecube adjusting frame rate.
Turn one off or the other, but can’t tell both to adjust.
That doesn’t seem right.
If you don’t enable frame rate matching in Plex you don’t see the Fire TV message about matching the frame rate so I have to conclude it isn’t being done.
If you enable the frame rate matching in Plex you then see the Fire TV message about matching the frame rate like you see in other products like PrimeVideo.
That makes me think that to match the frame rate you need it enabled in both Plex and the Fire TV cube.
How do you know?
DTS-HD what, Master Audio?
Does DTS:X pass through ok?
What shows up on your receiver or soundbar?
Yes, your logic is sound and you would be correct, frame rate matching would not be occurring unless both were enabled. Really don’t know where I THOUGHT I read that… thanks for clarifying.
Also correct, when frame rate matching, I can’t play DTS content full stop, get a terrible noise and it hangs.
Disable frame rate matching, and it does play.
As an example Jurassic Park, DTS-HD Master Audio (DTS X), plex says Direct Play on audio and the sound-bar says DTS.
However when I play Top Gun, Plex says Transcode (TRUEHD - OPUS) TrueHD is not supported on this device and the soundbar shows PCM.
Apologies for the mis-direction
That’s interesting.
I’m pretty sure that soundbar supports all the audio formats and I admit I hadn’t actually tried the cube with my q950a which also supports all these audio formats.
That DTS your seeing sounds like it’s passing through only the lossy DTS and not the DTS HD audio which is what I’ve reported above.
It’s very puzzling your TrueHD isn’t being passed through, with that kit it really should be, maybe worth checking settings at the Cube and TV, not sure there’s an option set HDMI port capability on the Samsung … if there is and your directly connected to the soundbar I’d check it as well.
You know that connecting the Cube to a TV HDMI (and the audio system to the TV ARC output) requires the TV support eARC to pass the HD audio through …
got it. hopefully there is a DTS passthrough fix soon or I might be looking to pick up a shield
This is the only reference to DTS-HD passthrough (basic profile) that I could find:
DV has been working on the FireTV about a month after its release. However, you’ll need a custom KODI build which you can get over here.
Nope, DTS-HD doesn’t work for you either and you’ve just confirmed it.
The Shield TV Pro (2019) is still my main player. I remember the Plex client being a complete sh*tshow with DV and lossless audio when the product initially launched, but after about two years they finally got it right. I use Plex alongside KODI and both are currently flawless.
The reason I’ve bought the new FireTV Cube is that it has HW AV1 and VP9 support, which the Shield lacks. However, without DTS-HD MA/DTS:X passthrough, it’s not the successor I was looking for. So hopefully Nvidia releases a new Shield with extra codec support any time soon.
DTS-HD extensions:
Express aka Low Bit Rate (LBR) - Lossy
High Resolution Audio (HRA) - Lossy
High Resolution Audio + X - Lossy with Spatial Audio
Master Audio - Lossless
Master Audio X - Lossless with Spatial Audio
I have to say I’ve had quite a bit of trouble working out what Kodi to install.
I had come across these but couldn’t work out which one to use. After your pointer I just guessed and the result works extremely well on the Fire TV Cube, I have DV and DTS:X sounds exceptional on my HT-A9 surround.
Thanks for the poke in the right direction, 
