Hello guest, if you like this forum, why don't you register? https://fanrestore.com/member.php?action=register (December 14, 2021) x

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
DTS-HD Master 2.0: L/R or Lt/Rt?
Hello everyone,

I'm currently working on a Blu-ray for which I have several PCM-tracks and a few DTS-HD Master 5.1/7.1-tracks. Since my BD-player seems to prefer Dolby Digital or DTS over PCM I now wanted to try, if I can get around this by converting the PCM-tracks to DTS-HD Master first.

The PCM-tracks are Mono and Stereo. For the Mono it's easy - I have to select 1.0 in the DTS-HD Master Suite. However, for the 2.0-tracks it confuses me as there are two options: L/R (Left / Right) and Lt/Rt (Left total / Right total). I already looked at the Manual, but couldn't figure out what's the difference.

Can anyone explain me what's the difference and which option I have to pick?

Thanks in advance!
Thanks given by:
I guess one of those is for 2.0 mono and duplicates the mono signal on both channels. My guess would be that the "total" is designed for that. But wait for someone who knows.
Thanks given by:
L/R is a simple stereo track.
Lt/Rt is basically Dolby Surround/Dolby Stereo, where 4 channels are matrixed into 2. I think in most cases this is probably what you're looking for. The compression is most likely the same, but the decoder will know that there is matrixed audio to be decoded this way.
Thanks given by: Dr. Cooper
Okay, so I was way off!
Thanks given by:
(2020-04-07, 09:00 PM)Beber Wrote: Okay, so I was way off!

Happens to the best of us. Big Grin
Thanks given by:
Thanks for the quick reply!
The 2.0-tracks are mostly Laserdisc- and TV-captures, so Lt/Rt should be the correct choice.
Thanks given by:
Yep. If the Laserdisc says "Dolby Surround" on it, it should be correct that way, unless they have made a mistake somehow. TV I don't know, haven't really looked into whatever conventions they might have had, especially with older analogue broadcasts. But I'm sure the information is available somewhere.
Thanks given by:
The TV-track is from a digital broadcast, no idea whether it's Stereo or Dolby Surround and how I can find that out for sure. But the Laserdiscs all said "Dolby Surround" on the cover.
Thanks given by:
If you have the original stream captured without reencoding and it's AC-3, you might be able to tell:


Apparently there's a tag in DD/AC3 called dsurmod, indicating this. However this also relies on the TV station broadcasting it properly ofc.

Not sure what tool would be able to read that tho.
Thanks given by: pipefan413
It really is AC3 and has been captured as broadcasted. However, I'm pretty sure there is no flag in it. A couple of years ago I had an AV-Receiver that showed when a surround-flag has been available, but I've only seen that on a single TV-station and other than that only on DVDs. All the others (including the station I recorded the track in question from) only aired L/R without surround-flag.
Thanks given by:

Possibly Related Threads…
Thread Author Replies Views Last Post
  DTS-HD Master Audio and bitrate (PBR) smoothing pipefan413 4 4,062 2021-10-20, 11:59 AM
Last Post: karbre

Forum Jump:

Users browsing this thread: 1 Guest(s)