Any metadata loss converting between DTS MA / TrueHD?

[shae]

Converting between DTS MA to/fro TrueHD, the raw audio data stays the same. But is there any potential loss of metadata?

Stuff like gain normalization, or I don't know what.

What about if going through FLAC?

[tebasuna51]

But is there any potential loss of metadata?

Nope, talking about DTS MA, THD and FLAC.

Other question is THD Atmos and DTS:X

[shae]

Maybe I'm mixing up something.
I vaguely recall DRC on AVRs only working with AC3 and not DTS, but I could be wrong.

Any ReplayGain-like header or stream flags in any of the 3 lossless formats?

Regarding Atmos (does anyone use DTS:X?), I never got the idea.
I thought it would allow realtime mixing that takes into account actual speaker positions, but does any hardware actually do that?

[tebasuna51]

I vaguely recall DRC on AVRs only working with AC3 and not DTS, but I could be wrong.

Any ReplayGain-like header or stream flags in any of the 3 lossless formats?
DRC or ReplayGain in lossless formats does not have sense

Regarding Atmos (does anyone use DTS:X?), I never got the idea.
I thought it would allow realtime mixing that takes into account actual speaker positions, but does any hardware actually do that?
Of course there are AVR's with support for Atmos and DTS:X.
I have a simpliest one 3D 5.1.2 (the standard 5.1 + 2 front upper)

[microchip8]

Any AVR from the past few years supports both Atmos and DTS:X, either out of the box or through a firmware update. I got a Denon AVR-X1700H and it comes with both. IIRC, there's no DRC/RG in lossless formats like Atmos/TrueHD/DTS:X/HD MA

[shae]

Hardware does support decoding, sure. But any speaker-position-dependent mixing?
AFAIK you can configure speaker distances, but not x/y/z positions.

What does gain compression have to do with whether the audio is lossy or lossless?
It's about normalizing volume sensibly, taking into account future volume levels, and maybe while minimizing clipping.

BTW, I found that mkvmerge has a --remove-dialog-normalization-gain switch (https://mkvtoolnix.download/doc/mkvmerge.html#mkvmerge.description.remove_dialog_normalization_gain), supported with AC3, TrueHD, and DTS.