Here's a story about "specifications" (and "change of specifications") that I believe it's worth reading. If you purchased an Intel NUC in the last couple of years you may find it pretty interesting. And, whether you are aware or not, it may also apply to you. Of course, some kind of comment from someone @Intel would be very appropriate.
I got my first NUC in the spring of 2014. It was a DN2820FYKH which I used exclusively to stream HiRes audio to my Onkyo receiver via Foobar 2000 (directly through the HDMI output via WASAPI). Never had a glitch, which, after all, is pretty obvious: all the NUC had to do was to decompress FLAC audio into a PCM bitstream and send it to the amplifier, which took care of everything else. Easy. So, since 2014, my library of HiDef music increased steadily, including plenty of 192kHz/24bit audio.
Given the satisfaction with the above, in the spring 2016 I decided it was about time to consider a similar approach for movies and videos as well. So, given the CPU limitations of the DN2820FYKH, I decided to purchase a NUC6i3SYH which, ON PAPER, had all the capabilities of my earlier NUC, plus enough processing power to cope with most video sources (after all, if DTS-HD, Dolby TrueHD, and whatever else are simply "passed-through" to a capable receiver/amp, you just need a CPU powerful enough to take care of video decoding... right?).
While such assumption concerning video was right (and, after setting the appropriate audio pass-through, video works indeed smoothly), I soon realized that my brand new "Skylake" NUC wasn't capable of playing any of my 192kHz/24bit audio files. What?!?
Useless to say, as such audio files played perfectly with my old DN2820FYKH, my disappointment was huge... but as the NUC6i3SYH had just been released, I optimistically assumed that such an obvious issue would have been fixed pretty soon by some Intel update. And, please note, I perfectly remember that at that time I double checked the original "Technical Product Specification" (which I still have): and that TPS clearly stated that "LPCM, 192 kHz/24 bit, 8 channel" was supported (and both through HDMI and Mini DisplayPort). So I felt sure that, one way or the other, sooner or later, I would have been able to play such files using the new NUC.
Hence, from time to time, I simply checked the Intel site to see if a new "HD Graphic Driver" (which includes the so called "Intel Display Audio") had been released, installed it, crossed my finger, and tried again.
Until last Sunday, after installing yet another driver version released on June 15 2017 (with no benefit whatsoever: just another waste of time), I decided that it was enough, and it was about time to post something on this forum. As I had browsed this forum in the past (and I was familiar with the typical follow-ups of "try changing the HDMI cable" or "maybe your receiver doesn't support that format"), I started gathering documentation and screenshots to show that everything was fine with my receiver and HDMI cables, and that 192kHz/24bit audio could be streamed perfectly not only from my old DN2820FYKH NUC but even through any other kind of PC I have (even an old i7-2600 with a Radeon HD 6450 can perfectly stream 192kHz/24bit to my amp, and both via the Intel® HD Graphics 2000 HDMI or via the Radeon HDMI!).
Then, when I was just about ready to create a new thread on this forum with all such evidence, I thought that it would have been a good idea to start such a post with a "cut-out" from the "Technical Product Specification", showing what Intel had announced/promised in terms of PCM audio support via HDMI and NEVER DELIVERED... This time though, rather then refer to the original PDF that I downloaded over a year ago (when I purchased the NUC), I decided to check the latest available document on the Intel site... And, guess what?
At the very beginning, on page "iv", under "Specification Changes or Clarifications", among a bunch of other things that are mostly meaningless and have no impacts whatsoever, it states:
"August 2016 Spec Change • Page 23 Table 7 from 192 kHz / 24 bit to 192 kHz 16 bit"
They fixed the 192kHz/24bit problem by simply and silently downgrading the specs...!
How cool is that?
Now, does this apply only to the NUC6i3xxx series?
Or, in other words, would I have been in a better position if I had bought a NUC6i5xxx or better?
No: I would have simply spent more money for the same kind of rip-off!
Because such an "August 2016 Spec Change" also applies to the whole NUC6i5xxx series and even the NUC6i7KYK (which is not exactly cheap, right?).
And what about the latest NUCs?
Oh well, you won't find a "change of specifications" history in their TPS (yet), and they all promise "192kHz/24bit" exactly as last year Skylake NUCs did... but I wonder why I should ever trust Intel again on such promises: maybe by August 2017 those specs will also be "downgraded" to "192kHz/16bit", huh? Or something else that worked fine on previous NUCs won't work any longer...
So, here's my 2 cents about this story:
1) Intel knows very well that lots of NUCs are used as "media players" in entertainment systems, or they wouldn't be providing CIR support in every one of them.
2) Yet, in their designs/implementations (and testing!) they seem to frequently overlook and disregard basic standards and assumptions (192kHz/24bit audio via HDMI was already supported by platforms that are now 6 or 7 years old, not to speak of all NUCs before Skylake).
3) I find it quite amazing to think that, while still at the design stage, people at Intel may have screwed up a simple computation such as:
192000 (hz) x 24 (bits) x 8 (channels)
and not realize that their design didn't provide enough bandwidth to PASSTHROUGH such a bitrate (which, by the way, is far from huge by today standards: just 36,864 kbps, huh?).
4) And it's even more disconcerting to think that nobody at Intel ever took care of thoroughly testing their PCM implementation through HDMI before the launch of all their Skylake NUCs (otherwise, they would have easily spotted the problem with 192kHz/24bit PCM audio and done something about it).
5) It's pretty clear that we (the users) are not treated by Intel's NUC division as customers, but rather as "guinea pigs". If you have the patience to do some searching/browsing on this forum, you will find plenty of people (mostly using the NUC6i7KYK) complaining that 192kHz/24bit audio through HDMI (or whatever else) was not available, and no Intel representative ever took the pain to confirm/address the problem. They just suggested to update the bios, drivers, try a better HDMI cable, or even told them that it was probably the fault of their amp/receiver. And of course all such suggestions turned out to be a waste of time (because the problem was Intel's own design/implementation).
6) It took about ONE FULL YEAR for Intel to recognize the problem with their HDMI/PCM implementation on their Skylake NUCs (6i5xxx were launched in Q3/2015, the spec revision occurred in August 2016), and, after one year, how did Intel address the problem? They just simply (and silently) "downgraded" the specs.
7) I was not born yesterday, and I am well aware of all the fine prints and "specifications subject to change" stuff, but that's meant to give manufacturers freedom to update specs and features for future revisions of their product, not to downgrade the specs of somethin...
Thank you for contacting Intel Communities.
I apologize for this inconvenience.
I have forwarded your feedback to the appropriate team.
Hi, I'm very interested in this as well.
Since I have the same issue, trying to playback 24bit192kHz music through a HDMI cable on my new NUC7i3BNH.
This is really disappointing INTEL, I have a 5 year old Xtremer Ultra 2 that can do this, and it's running a 2 core atom cpu...
Is this a limitation or a bug, or perhaps a nice "feature"? (Yes I'm being ironic, angry and disappointed).
Depending on your answer I'll be returning this unit. (Not holding my breath though.)
The Intel® NUC Kit NUC7i3BNH supports 192 kHz/24 bit, 8 channel, you can review the information https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/NUC7i3BN_TechProdSpec.pdf here (page 25, Table 8 - Audio Formats Supported by the HDMI and USB Type-C Interfaces).
I hope this helps.
Juan: I find it rather amusing that you point Grip77 to the Technical Product Specification of his NUC after the kind of detailed story I took the pain to describe above.
Because exactly one year ago, according to your Technical Product Specifications, even ALL YOUR SkyLake NUCs (6i5SYH, 6i5SYK, 6i3SYH, 6i3SYK, 6i7KYK) were described as capable of supporting "192 kHz/24 bit, 8 channel". But as I pointed out above, the truth is that they were never capable of that.
Worse: they didn't even allow 192 kHz/24 bit STEREO, because your driver doesn't advertise itself as being capable of 192/24 at all. Got it???
And did you ever took care of providing a fix? Or to alleviate the problem by allowing at least 192/24 stereo (and possibly even 5.1) to pass through the driver?
NO, not at all. You guys thought that it was much easier (for you) to simply downgrade the specification to 16 bit. Which is exactly what you did (very silently of course) in August 2016 for all the above mentioned NUCs: you removed any reference to bitstreaming 24 bit audio via HDMI from you TPS, and provided specs for 16 bit only (which, nowadays, nobody cares about).
Which demonstrates two rather important things:
So, given the above story (which certainly applies to all SkyLake NUCs), if Gripp77 tells you that he can stream 192kHz/24 bit audio using an old Atom based PC (which means that his HDMI cables and amplifier are just fine, and he knows what he is talking about), but he cannot achieve the same result with his latest KabyLake NUC, you should take this very SERIOUSLY, and investigate the matter well beyond what the TPS says.
Once you turn your own TPS into a joke (which is exactly what you did in this regard for all SkyLake NUCs) people will no longer trust them.
So telling Grip77 that "192 kHz/24 bit, 8 channel" exists because the TPS says so is NOT enough any more.
Please make sure that whoever was in charge of this actually verified and tested such a spec for the latest NUCs, because it's absolutely clear that they NEVER did such a simple and basic test for 5 different models of SkyLake NUCs (plus related boards).
Thanks for the information, but that is not the issue, I've already read the specification.
The problem is the NUC7i3BNH actually does not support those formats at all, it is not possible to send such a signal through the HDMI interface from the NUC since it restricts it to 24bit 96kHz 2channel at maximum.
No matter what cable or what equipment you have at the other end.
You can try this yourself and you will see the same result.
So my question is, is there a fix, or is this by design?
Just give it a try yourself, it's easy to replicate.
Below is a link to a free sample of a 24bit 192kHz wave file, try to play that using whatever player you prefer and look at the details of the playback, if you can prove that it plays the file at 24bit 192kHz I will eat my hat (First I will need to go out and buy one..).
I appreciate your support on this issue. I don't have a Kaby Lake NUC to verify myself, but given the experience I described above (and which nobody @ Intel can deny), I'll definitely trust your own assessment much more than anything written in an Intel NUC Technical Product Specification. And as I wrote since my very first post, I had some kind of feeling that such an issue may also affect the latest NUCs.
This is definitely not "by design". The appropriate technical term for promising something a system doesn't do (and then, after some time, just downgrading the specs) is "rip off".
So I would really appreciate if anyone reading this thread understands that here it's not just a matter of 192kHz/24 bit being supported or not. What we are talking about here is the credibility of what Intel writes and promises in its own NUCs specs. And about their approach of simply "downgrading the specs" (without even an apology) once it is clear that what they promised cannot be achieved. While, at the very least, they should try to alleviate the problem: if the system cannot handle the 8 channels @ 192kHz/24 bit you originally promised in your specs, at least give us support for stereo!
So please, whoever read this, even if you don't give a damn about 192kHz/24 bit audio, if you have a Kaby Lake NUCs (and a 192kHz/24 bit capable receiver) just give it a try: use the links Grip77 just provided to download those sample WAVs, try to play them through your Kaby Lake NUC and see if your amp actually receive them as a 192kHz/24 bit stream.
If not, please go to the bottom of my very first post in this thread, and click the link "I have the same question".
This whole situation is already crystal clear for all SkyLake NUCs, and it's about time Intel starts realizing that they cannot write something in their spec and then not be held responsible if they don't deliver.
I would also like to add some further comments for whoever @ Intel may be reading this.
Assuming your NUC HD graphics subsystems are capable of handling the passthrough of some basic 192/24 bitstream (such as stereo), and that you already have the related code readily available and implemented in just about every other driver/platform (including those for all earlier NUCs), and given 192/24 support (for 8 channels!) was mentioned in all your original specs, I see no reason whatsoever why at least some basic support for 192/24 PCM (such as stereo!) should not be provided ASAP.
In other words I would like to know at the very least why you don't:
Please, don't tell me that the above would require a lot of expensive development and testing because this is something you should have already done a very long time ago, well before launching all these NUCs. And as far as generic "non regression testing" is concerned I assume (and hope) you run plenty of that anyway, given you release new drivers just about every other month.
Also please understand that what I suggested above is not a "nice to have optional feature" which you may or may not consider for development, but it's something that it's now long overdue (surely for all SkyLake NUCs), and as such it should be at the very top of your priorities. You promised 8 channels PCM @ 192/24 via HDMI for all SkyLake NUCs more than a year ago: well, after more than a year, give us at least TWO channels of 192/24 PCM. And I really mean RIGHT NOW!
Last but not least, please note that telling me that my comments have been passed to the appropriate "Intel team" as Juan wrote above (thus suggesting that I should keep on waiting for something that may never materialize) is not an acceptable reply at this stage. I've already waited more than a year for a feature (192/24 PCM stereo via HDMI) that nowadays is taken for granted, and that your technical literature described as being easily within the capabilities of all Skylake NUCs. Yet, as this never materialized, and I recently discovered that you just opted to "downgrade the specs", I expect to hear from you clear and simple if/how/when you will give us at least some limited (stereo!) support for 192/24 PCM audio bitstreams via HDMI and other ports.
Because after all the time I already wasted waiting for a fix (and after countless BIOS/drivers upgrades that didn't address this issue), I believe that I deserve to know if you will or will not provide such support (at last for stereo), so in the latter case I can make up my mind on a different system/solution for my entertainment system.
And of course, in case you won't bother to provide at least stereo 192/24 support, you can stay assured not only that I will never ever trust anything written in a NUC "Technical Product Specification" anymore, but also that I won't hesitate to alert others to do the same.
In the meantime I'm still here waiting for a clarification...
thank you very much for taking the time to verify the issue yourself (whatever the specs said), and then confirm it, and escalate the problem.
I'll appreciate if you can follow up in one or two weeks, after checking with the involved "teams" to ensure that the issue is being addressed, and thus confirming us that we can expect some kind of solution in the not so distant future (at the very least support for 192/24 PCM stereo).
And once more, please let me stress that whatever some people may think or say (or even be aware of), nowadays 192/24 audio is nothing fancy or esoteric and not even "optional". Hence exactly as the original NUC specs indicated, some 192kHz/24 bit PCM support MUST BE PROVIDED (surely stereo, and possibly 5.1 as well).
So, if helpful, please make sure that relevant "Intel teams" understand the following.
It's a fact.
And since HDMI 1.0 this happens to be 192kHz/24bit PCM.
That's why nowadays 192kHz/24bit PCM audio support by a PC is almost taken for granted.
And that's why, as both myself and Grip77 pointed out, this has been available in just about every PC platform equipped with an HDMI port in the last 6 to 7 years.
Last but not least, of course, this is also why 192kHz/24 bit PCM support has always been included in the specs of each and every NUC: it's simply a MUST.
Because though many people may not grasp this (probably including people in those "Intel teams" that didn't care much about PCM implementation and testing for the latest NUCs), PCM support is definitely much more important than DTS-HD, Dolby TrueDigital and whatever other format may be coming in the future. Evan lacking HW support for any such format, they can still be handled via software, decoding them to linear PCM without any quality loss.
But this of course only applies as long as PCM passthrough is fully supported!
That's why PCM support is so important.
Hello GuineaPig/ Grip77,
Thank you for waiting.
I have consulted with the upper level of support about your inquiry and unfortunately, 192 Khz / 16 bit is the maximum audio that can be supported at this time.
There is no way to know about all changes to be made in the technical documentation as they happen very often.
Thanks for the answer, but I believe it would be more beneficial for us if you could tell us what the reason behind this restriction is.
Is it the built in soundchip, the HDMI chip or a driver?
By knowing this we could see ourselves when or if any changes to upcoming NUC's might fix this.
thanks but no thanks.
I have significant doubts that anyone would define "192kHz / 16 bit" as "maximum audio" (whatever that means). But indeed it may define the "maximum incompetence" of whoever passed along such irrelevant information (and let me be clear: I appreciate your follow-up and I do understand that this is not your fault).
It seems that this should have been escalated directly to PRODUCT MANAGEMENT level.
It may seem a minor glitch to some, but as I already pointed out it's not just the issue itself, but rather its implications that are huge, because they clearly imply that:
Early SkyLake NUCs were released in the fall of 2015, and they were all said to be capable of 192kHz/24 bit PCM audio (which is nothing fancy: all earlier NUCs supported that, as well as just about every other PC on earth has been doing for years). But it's crystal clear that the related development team never bothered to support/implement/test any such capability.
For months, when customers pointed this out, they were simply told to check/change their HDMI cables, and/or to refer to the "supported equipment list" for an amp/receiver that had been tested as "compatible". Absolute B.S.: no such testing had ever been performed, or the problem would have been obvious.
In spring 2016, the Skull Canyon NUC was released, again with specs mentioning 192/24 PCM, and again this was never available. More customers pointed this out, and more customers were told to check their cables or that it was the fault of their amp/receiver. Once again: B.S.
Then, in august 2016, all of a sudden and very silently, the specs for all the above NUCs were simply downgraded from 24 to 16 bits, which is meaningless.
In the fall of 2016 the early Kaby Lake NUCs were released, such as the one Grip77 owns (or maybe I should say "owned"). Once again, according to their specs, they were capable of 192/24 PCM, and, once again, this was not the case.
More Kaby Lake NUCs released in early 2017: same as above.
Given what you wrote ("192 Khz / 16 bit is the maximum audio that can be supported at this time"), I assume that by August 2017 the specs of all Kaby Lake NUCs will also be downgraded accordingly, exactly as it happened last year for the SkyLake models.
So, it's pretty clear that if someone doesn't escalate this issue up to Product Management level, the same will also happen next year, for the subsequent generation of NUCs: specs saying something that nobody ever bothers to develop and test, a lot of head-scratching for customers and support, and finally the specs being downgraded.
Does this seem normal to you?
Furthermore, let me state loud and clear that whoever said that "192 Khz / 16 bit is the maximum audio that can be supported" appears to me like a lazy, reticent, incompetent and unreliable source of information (and product management should also have a chance to assess this).
Once and for all, let's stop talking of 16 bit audio. Nobody ever asked anything about 16 bit audio here. A higher number of bits is much more important than a higher sampling frequency. It's a little bit like resolution vs. frame rate on a TV... or, if you prefer, just think of monitor that can only display 65K colors (that's 16 bits!) compared to one that can display 16 millions colors (that's 24 bits!).
Anyone in pro-audio (I mean RECORDING INDUSTRY) will confirm that even 96/24 is much better and preferable than 192/16.
So, the question here, from the very beginning, is what kind of support is actually available (now and/or in the future) for 24 bit PCM audio, which was the format originally mentioned in all the specs.
Did anyone tell you anything on that?
I guess they didn't. Because they are lazy, reticent and possibly also incompetent.
So they simply told you to quote a spec for "16 bit" instead, as if it was the same thing.
How is that within the Intel NUC division, that promised 192/24 PCM support for all such NUCs, whoever is in charge of this stuff is not even capable to assess and provide details of what kind of support for 24 bit PCM audio is actually there???
I tell you why: because they prefer not to talk of 24 bit audio at all, otherwise it would appear just obvious that they can easily support 192/24 stereo and even 5.1 surround.
Because, as I wrote since my very first post, all the above mentioned systems appear to cope perfectly with 24 bit PCM audio up to a frequency of 176kHz (multichannel).
And 176/24 is definitely much more "maximum audio" than 192/16, as anyone in the recording industry will be able to confirm. And by a lot!
Now, given that for PCM implies very simple bitstreams without any compression (which is why it's often called LINEAR PCM) the underlying math is absolutely simple:
176000 (hertz) * 24 (bits) * 8 (channels) = 33,792 kilobits per second
So: all such systems and related drivers are definitely capable of dealing with such a PCM bitrate. And by the way, as all such systems also support multiple displays (with related audio), there's surely much more headroom available when using just a single display.
But nevertheless, regardless of this latter consideration, let's stick with the above number: your systems can definitely handle a PCM bitstream of 33,792 kbps. OK?
Now 192/24 stereo PCM means:
192000 (hertz) * 24 (bits) * 2 (channels) = 9,216 kilobit per second.
Definitely a bitrate that your systems can very easily cope with.
And for a typical 5.1 surround configuration:
192000 (hertz) * 24 (bits) * 6 (channels) = 27,648 kilobits per second.
Which also appears to fit pretty comfortably within the above mentioned bitrate.
I repeat: all we are talking about, on the NUC side, is the ability to pass-through a simple sequence of bits at a given rate: it's the receiver/amp responsibility to group them in 16 or 24 bit chunks and send them to the appropriate Digital-to-Analog converters. For the NUC if it's 8 or 16 or 24 bit PCM doesn't even make any significant difference, as long as the overall resulting bitrate doesn't exceed the system pass-through capabilities.
So, whoever said that "192 Khz / 16 bit is the maximum audio that can be supported" is either reticent or, even worse, absolutely incompetent.
just to clarify: there's no "sound chip" involved (that's for analog output, like headphone or whatever).
And HDMI ports are meant to support 8 channels of 192/24 PCM since version 1.0 of the standard (we are talking about year 2002).
The problem here is that the PEOPLE in charge of this area (and related driver) are CLEARLY IGNORANT.
What would you choose, a PC display capable of 120Hz refresh rate but supporting only 16 bits per pixel (resulting in 65k colors), or a PC monitor with a 60Hz refresh rate capable of 24 bits per pixel (16 millions colors)? The answer is obvious.
The same applies to audio: 24 bit offers much better definition (16 million different values), and no one in PRO audio would go for 16 bits, not even if @192kHz.
Which is the reason why, if you check the audio device properties in Windows, ALL 24 bit formats are described as "studio quality" (whatever the frequency!), because even 44.1kHz / 24 bit is much better than anything at 16 bit.
But it's clear that this guys don't have a clue, and they come and tell us that "maximum audio" is "192/16" as if this was some kind of achievement in 2017.
And probably that's the reason why they never bothered to develop/test 192/24... they think that 192/24 or 192/16 are nearly the same (I repeat: even 44.1/24 is better than 192/16, and even the Windows audio properties UI is very explicit in this regard).
So, in their ignorance, these guys decided it wasn't relevant, and they didn't even inform anyone (e.g.: product management), before product launch, that they weren't going to move a single finger to support 192/24 (not even stereo).
That's why I have the feeling that as long as this matter doesn't reach someone knowledgeable with this stuff, the issue will stay there.
And they will just go on releasing further NUCs mentioning 192/24 PCM in the specs that nobody ever cares to develop/test, exactly as they did for all "Intel Core" NUCs released in the last couple of years.
If you play a file created as 192Khz/24bit on a 2 speaker monitor through HDMI, does it get sampled down so it can be heard or does it not play at all? I'm not using a receiver with 8 channel audio, only a monitor with speakers through HDMI. Or headphones through the Realtek audio plug sometimes.
it depends on the software you are using... most programs (e.g. Foobar) display an error saying that such files cannot be played because 192/24 is not supported.
Other programs (e.g. Kodi) will automatically resample the file to the highest format available (176/24)... In my case it's pretty easy to verify this by turning on the OnScreen Display of the amp, and checking what kind of PCM bitstream the amp is receiving on its HDMI input (it states 176/24, so it's clear that Kodi is resampling the audio file on the fly).
The above applies regardless of the number of channels. Even a MONO WAV file that I created for testing cannot be played at 192/24.
As I wrote, as all such NUCs can cope with 176/24 multichannel, it's clear that they there's plenty of bandwidth to support PCM bitstreams for 192/24 stereo (and even 5.1).
But it seems these Intel guys don't give a damn about it. Though 192/24 PCM was the original spec for all such systems, they never cared to do anything at all to support it: not even just for stereo.
And they just come and tell us that "unfortunately, 192 Khz / 16 bit is the maximum audio that can be supported at this time"...
Fortunately, differently from such guys, programs like Kodi know very well that it's much better to resample by reducing the frequency rather than reducing the bit count...
Any 24 bit format is better than 192/16 that these Intel guys define as "maximum audio"... LOL.
Thanks for the explanation.
I checked with a friend of mine and he said that same thing. He was going to try some of the older NUCs like RY (Broadwell) to see if they have the same issue. He said that he heard it might be the gfx driver that is the issue. Not sure where he heard this but sounds logical since the previous NUCs (FY BayTrail) worked at the 192Hz/24bit level.
yes, it's driver issue, or more specifically, a problem with the guys responsible for the driver, who never cared to develop/test according to specs, and now don't bother to provide a fix at least for 192/24 stereo.
As I mentioned in my first post, I had an old NUC DN2820FYKH (I mean: dual celeron!) which supported 192/24 just fine. The same applies to every PC with a HDMI port I have (even if 6 years old).
I believe the problem started with the 6i NUCs, and then it was inherited by all the 7i NUCs.
At this stage the 6i NUCs (all of them) are the only ones with the infamous change of specs (downgrade from 24 to 16 bit PCM).
But given what we have been told here about "maximum audio" it seems the same "change of specs" will soon appear for all the 7i NUCs as well.
I checked the "Technical Product Specifications" of some of the earlier "Intel Core" NUCs (such as 5i), and this area was never changed, and it still mentions "LPCM, 192 kHz/24 bit, 8 channel" for all digital ports (so I assume that such NUCs had no problem with 192/24 audio).
The problem is that the driver doesn't seem to provide any kind of flexibility as far as audio is concerned.
For instance, they quote different video resolutions for each port depending on the number of displays used simultaneously.
But for audio it seems that they just stick to whatever the bandwidth allows when all the ports/display are active at their maximum resolution: just the lower common denominator, and that's it.
Once they realized that such lower common denominator was not enough for "LPCM, 192 kHz/24 bit, 8 channel", they decided once again to keep it simple, and remove support for 192/24 all together, even if they could easily support stereo and 5.1.
I use only the HDMI output, and it's not even configured for 4k (just old fashion HD: 1920x1080), so there's plenty of bandwidth available there to stream 192/24 PCM stereo.
Yet I'm not allowed to play any of the 192/24 stereo files I have without resampling.
And now here I am, being told that "192 kHz / 16 bit is the maximum audio that can be supported at this time".
In other words:
Hence, it seems that my experience with "Intel NUCs" is going to end here.
If their people don't understand basic concepts such as "customer satisfaction" and "customer care", it's completely useless to expect them to understand anything else of what they do, be it audio, video, or whatever else.
I have a new wrinkle for you. Check this out:
This was done on a i3 BN NUC with drivers from Intel's download site from late June. This is a clean install of Windows 10 x64 1703. I also installed the latest BIOS 0048 and the HDMI 2.0 firmware update to 1.66. This is plugged into a Denon AV receiver using HDMI and a HDMI 2.0 HDR monitor. It still does not show 192/24 but does show 176/24.
Hi guys, just letting you know I've returned my nuc 7i3bnh as defective on the basis that it was falsly advertised as 24/192 capable, had a working ir receiver (lots of issues with it) and finally for having issues when connected to a hdmi switch.
This thing is litterally broken, intel should stick to making CPU's and SSD's, AMD/Nvidia here I come!