Update on above (sorry a little late):
The issue is unresolved, however I will be investigating and possibly will be sending emails to certain companies.
However, instead I delivered the next best thing, a fully working Interactive:X, with E-APO upmixing.
If you have a SPDIF or HDMI receiver that supports 'DTS Audio' or 'DTS-HD', you can use this package.
If you have HDMI that supports DTS:X, make sure the receiver is set to passthrough.
Interactive:X - A combination of DTS:X Ultra multichannel + DTS Interactive (5.1 HW, 7.1 Virtual).
----
Windows 10 Atmos test, note there is no DTS:X HT on Win10:
Watch "Dolby Atmos - SPDIF" on Streamable.
streamable.com
On Win11,
ajf64 got format not supported with Atmos.
====
Here is something I have sat on for a while, but have not said anything until now.
Either Microsoft is very dumb with SPDIF, and even HDMI for that matter when it comes to DirectSound, or companies like DTS-Dolby don't like the fact it pretty much takes them out.
Given that SPDIF is capable of 15 PCM channels @ 192k, at the lowest end (consumer), with TOSLink 2.0 @ 125Mbit/s max. Currently you only need 25Mbit/s.
The slowest TOSLink 2.0 module is 20Mbit/s, which covers all formats, including most of DTS-HD MA (24.5mbps), which is rarely that size.
Wikipedia claim that: "IEC 61937-3: defines how to transmit Dolby Digital (AC-3) and Dolby Digital Plus (E-AC-3) bitstreams via an IEC 60958/61937 (S/PDIF) interface".
And then later: "However, the
S/PDIF interface has insufficient bandwidth to transport Dolby Digital Plus (E-AC-3) bitstreams at the 3.0Mbit/s data rate specified by HD DVD".
According to Wikipedia, HD-DVD was released in 2006, and yet I can find info on TOSLink @ 125mbps from 2008, only 2 years later (
here and
here).
HDMI ARC, which came out in 2009, has a maximum bitrate of 1Mbit/s, eARC (2018) and HDMI-DiplayPort are 37Mbit/s.
Also note, SPDIF has no set bitrate, and its set by the hardware that is used, 125Mbit/s is roughly equal to 27 x 192k.
Can anyone name an operating system, HDMI version and GPU that does 11.1 PCM @ 192k?
Realtek 889 PCM is capable of the following:
PCM bitrate:
9.216 Mbit/s @ 192 kHz
Audio channels: 2
Number of audio programs per bitstream: 2
Sample rate: 32, 44.1, 48, 88.2, 96 or 192 kHz
Dolby Digital Plus is capable of the following:
Coded bitrate: 0.032 to
6.144 Mbit/s
Audio channels: 1.0 to 15.1
Number of audio programs per bitstream: 8
Sample rate: 32, 44.1 or 48 kHz
View attachment 235158
----
A man walks into an AV shop, and asks for a good SPDIF device to go along with his TOSLink cable that specifies all formats supported and runs at 125 Mbps, that he just purchased.
Sales man: No sorry sir, I dictate you cannot use SPDIF, because I quote "It does have the bitrate for lossless formats." I can sell you HDMI which runs at 37 Mbps.
Customer: WTF! How am I meant to get 12 channels (11.1) in PCM @ 192k (55.3 Mbps) with only 37 Mbps?
Sales man: I can sell you some multichannel spatial tech, which requires specific hardware and a license, or you can use digital encoding + license.
Customer: Double WTF!
====
@
ajf64, with Win11 on SPDIF, with the added formats, if I select either DTS:X HT or Atmos HT, in both cases the store opens on the app.
I don't get the 'format not supported' error that you do, so I believe there is an issue with Windows it's self.
I have forgotten if the install was an update from 10, a fresh Win11 might be needed.
I will continue to look into DTS:X HT on SPDIF, another few posts
here.
You can tell the license based restriction has been intentionally programmed, because SPDIF does not have DTS-HD normally, and will not show DTS:X HT.
The same can be said for DTS:X Ultra, and if I remember correctly, the Sound Unbound decoders, they don't work on SPDIF, by programming.
Again you can tell the programming is intentional, as any driver with DTS:X Ultra, never has it on SPDIF, and its denied if you try.
The PCM portion of SPDIF is no different to Speakers or HDMI, PCM is PCM, APO's are PCM processors.
View attachment 235320