Originally Posted by edmoney
Ah, I see. So then that implies that decoding of DTS-HD Master Audio 2.0 Surround is automatic/forced for a multi-channel speaker profile, without the option to choose whether you want the surround decoding or not. This in effect makes it a 4.0 (or 5.0?) track that gets downmixed on one's system if they only have 2 speakers. What's confusing is why have a 2.0 Surround track that will automatically "upmix" instead of just using a multi-channel track (e.g. 5.1) that will downmix if needed. And I don't quite get the purpose of offering both a DTS-HD Master 2.0 Surround and a 5.1 track on the same disc. Seems somewhat redundant.
The disc rightfully carries a 5.1 and a stereo version of the mix if/when both versions are available, as they can be rather different. The issue lies with the Anthem processor somehow insisting on applying upmixing. I have encountered the same issue with a Blu-ray of Dave
, which carries only a 2.0 DTS-HD MA track, sourced from a Dolby Stereo Lt/Rt master.
Anthem gives me 3 Mode options in this case: DTS-HD Master, DTS Neural:X, Dolby Surround. If I select Neural:X, the height speaker are used. If I select either of the others, they are not used. But all 7 main speakers are used in every case. Also, even though the display will read Dolby Surround, I do not think it is in use. The sound is identical with whatever is upmixing in DTS-HD Master mode, which I presume is a 7.1 version of Neural:X.
There are two ways to easily hear it in pure stereo.
1) Tell the BD player to output PCM.
2) Create a Speaker Profile that has only L/R and optional Subwoofer. I called mine "Stereo".
You can select it from the Setup menu when needed, or create a new virtual input for the BD player that calls the Stereo profile.
ETA:Technically, applying upmixing to these titles is consistent with the intent of the original mixers. They mixed them that way and were presented that way in cinemas.
Deadwood II Theater
(Previous Deadwood Theater HTOM
Anthem AVM 60 7.4.4; Classé SSP-800 PLIIx 7.4; MiniDSP OpenDRC-AN
Oppo UDP-203; Oppo BDP-93; Win10 media PC w/Roon+Kodi; Roku Ultra; DirecTV Genie
Adam Audio S3V/S3H LCR, KEF Ci200QS 4 srrnd, Tannoy Di6 DC 4 hts, Hsu ULS-15 4 subs
JVC RS520; Stewart Cima Neve screen 125" diag 2.35:1, MLP at 115"