I have a very strange audio issue that I'd like advice on.
I recently replaced my NUC DC3217BY with the NUC6i7KYK. The computer sits under my TV for media playback, video calling, and gaming.
My TV is a Panasonic plasma from 2008 with Full HD resolution. The surround amp is a Marantz NR1601 (HDMI1.4a) with 7.1 surround.
Windows is set up to output 7.1 with 24-bit audio @ 96kHz. This setting is common between the two NUCs.
For media, I stream YouTube or Netflix, play video files using VLC, and play DVDs/Blu-Rays using WinDVDPro.
With my DC3217BY I used WinDVDPro11, on the NUC6i7KYK I use WinDVDPro12. The drive is a Pioneer BDR-XU03 connected to one of the rear USB3.0 ports of the NUC.
The DC3217BY setup was flawless. It is only nearly flawless with the NUC6i7KYK.
I can play everything, but when I open WinDVDPro12 to play a DVD or Blu-Ray, I notice the PCM indicator on my amp blinks off for about half a second every 10-20 seconds with an accompanying break in audio from the speakers. There is no issue with the video playback at all.
If I close WinDVDPro, the audio glitch continues on the same cadence regardless of what programs I open or what media I play.
The only way to get it to stop is either to put the computer into and out of standby or select a different audio playback device from the Windows 10 volume dialogue and then switch back to HDMI.
While WinDVDPro is open, if I change audio output to the headset jack or my Bluetooth headphones, there is no glitching on those outputs. When I revert to HDMI, the glitching resumes.
I have downloaded the Intel Driver Update Utility. However, when it scans my computer it keeps throwing up the same software and drivers as out-of-date. Attempts to install recommended versions fail. The graphics driver and the audio driver, however, are up-to-date. The chipset, Thunderbolt and a couple of others (including CIR) are flagged as wrong (I am not using the Thunderbolt port yet, the CIR seems to work without issue).
I have tried to run the HDMI v2.0 firmware update, but it will not install until I connect a HDMI v2.0 compliant device, which I do not have.
I don't believe I can blame WinDVDPro for the glitching as all it has to do is decode the audio and video from any disc that is playing, which it does correctly with all my other audio devices and there is no issue with the video at any point.
The fact that the issue starts when WinDVDPro starts is suspicious, but closing WinDVDPro does not fix it (I have to adjust audio output or put the computer to sleep).
The HDMI cables are all 1.4 high-speed and are 3' or 4' in length, so signal distortion does not seem likely (and anyway, audio is fine with every program except WinDVDPro).
My Marantz receiver is compatible with the audio settings I have.
Are there any known incompatibilities with HDMI audio that I can investigate?
Why doesn't the driver update utility work correctly to update all the drivers it says are outdated?
I have tried altering the settings for audio in Windows, but no sample rate or dynamic range bit-depth has any different effect. I have tried changing the way WinDVDPro works with audio from the DVD/Blu-Ray discs, but again no change.
I would like to gather more information in regard to your system, this will help to address this matter in the most accurate way. So please respond to the following;
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I am also encountering the same issue as mentioned by Wibble. HDMI audio keeps breaking randomly where video signal remains consistent.
NUC : NUC6i7KYK
OS: Windows 10 Pro 64 bit
HDMI cable : Panasonic HDMI2.0 4k compliant cable
AV Receiver : Onkyo TX-NR636
I have tried the following but it did not resolve the problem
1. Updating to latest display drivers
2. Perform HDMI 2.0 firmware update from Intel product download page
3. Changing to different HDMI inputs on the AV receiver
4. Changing to different HDMI cables
5. Booted on ubuntu live image
6. Configured BIOS to use HDMI as primary display output
I'm attaching the SSU report as well.
Calvinz,I just wanted to let you know that we are currently reviewing this case, and since you have a very similar situation your information was already added to this research. At this stage, I do not have an update, but I will let you know via this thread as soon as I have more information,
I also noticed that you are running BIOS version 041, and we have BIOS 042. So, please proceed updating that version to the latest, find file below.
https://downloadcenter.intel.com/download/26338/BIOS-Update-KYSKLi70-86A-?product=89187 Download BIOS Update [KYSKLi70.86A]
http://www.intel.com/content/www/us/en/support/boards-and-kits/000005850.html F7 BIOS Update Instructions for Intel® NUC
Actually, thinking about it (although I can't attest I'm 100% right here...) between my first post and my update and using the audio settings to correct the DVD glitching, I performed an upgrade to the BIOS. Can't recall which one came on the computer. I upgraded not long after my first post so that would have been reflected in the diagnostics I uploaded.
I wonder whether this had an effect on the ability of the volume settings to change the glitching behaviour...
I could swear the characteristics in my first post were correct at the time of press...
I had tried to update the NUC firmware to the latest available (BIOS 042) but the issue still persists. However there are some findings from myself where I noticed the audio dropouts are far lesser when I'm running on 1920x1080(60p) resolution compared to 3840x2160(60p). And I had tested the HDMI going through a intermediary powered HDMI switch which further helped but not entirely.
Calvinz, can you try something for me first? Sorry, I'm one of the supervisors in customer support.
Can you try using Media Player Classic first before we go out and get the paid application? We test everything on MPC (according to this setup: http://www.intel.com/content/dam/support/us/en/documents/boardsandkits/Configure-Surround-Sound.pdf http://www.intel.com/content/dam/support/us/en/documents/boardsandkits/Configure-Surround-Sound.pdf ), so if it's still having issues with that, then we know it's not the software.
Also, one more thing, just to confirm, does the glitch happen on any other piece of software?
Yes, my tests were mainly on VLC and MPC which returned the same results. Not to mention playing clips off browsers (via youtube.com) does display the audio giltch as well. Hence I would say it is not limited to only a certain application. However while playing videos fitted with Dolby TrueHD or DTS HD, the audio would never EVER break, something to consider about.
Ah, ok, good to know.
That's interesting about the Dolby DTS, I assume you're bitstreaming?
I know this is annoying, but in order to isolate the issue, is there any chance you've tried either a mini DP -> HDMI cable/adapter or a USB Type-C -> HDMI cable/adapter? Maybe you can purchase one that allows refund w/in 30 days or so to test?
If you can't do that, that's fine, but I'm guessing it's an HDMI issue as we've seen other HDMI issues in the past be solved with the above adapters.
I have already tried that option as well, using a club3D mini displayport 1.2 to HDMI 2.0 adapter. This also gave me the audio glitches too. However I have not gotten myself a type-C to HDMi adapter, would have doubt of it working too unfortunately.
Yeah, I'm doing bitstreaming to my AV amplifier for videos that have DTS HD/Dolby TrueHD audio stream. Those did not give me any issues.
Good news ! I have tried with a USB-C to HDMI adapter (running at 1920x1080p60) and the audio glitch appears to be gone completely. Specifically using the digital AV adapter made by Apple themselves. Besides the short audio blackout during every start of video, the audio had never ceased to stream which is a good thing. HDMI cables and the input point on the AV amplifier were the same.
USB-C -> HDMI adapter @ 1920x1080p60 = Flawless
USB-C -> HDMI adapter @ 3840x2160p30 = Flawless
Displayport -> HDMI @ 1920x1080p60 = Minimal glitch
Displayport -> HDMI @ 3840x2160p60 = Frequent glitch
Displayport -> HDMI @ 4096x2160p60 = Minimal glitch
HDMI only @ 1920x1080p60 = Frequent glitch
HDMI only @ 3840x2160p60 = Frequent glitch
HDMI only @ 4096x2160p60 = Frequent glitch
Update: The Apple USB-C digital AV adapter works fine for PCM output, however it would not work for any bitstreaming audio streams. This seems to bring us closer to the cause of issue. As the Apple adapter could only reach 3840x2160p30 and only PCM output, I went and got myself a Club3D USB3.1 Type C to HDMI 2.0 adapter in my attempts to resolve those gaps. Without a doubt 3840x2160p60 works and bitstream is back, BUT audio glitches returned as well ! So what I can roughly conclude here is that :-
1. Either the audio stream from the NUC is corrupted which is switching in between bitstream and PCM
2. NUC could not handle the HDMI2.0 format ?
3. Or possibly the HDMI2.0 firmware update had broke something on the NUC ?
Thanks for the testing Calvinz.
This is so very strange.
I know this will be a BIG pain, but is there any chance you can bring your NUC to a friends or a stereo store and test it there? Both an HDMI 1.4 or 2.0 reciever would be best, but whatever you can do is what you can do. Completely understand if not.
Actually I have already tested that scenario before. I connected the NUC towards the TV which logically only supports stereo ouput and no bitstream audio support, the audio glitch is no longer present with either HDMI 1.4a or 2.0 cables.
Thanks Calvinz, and while it's certainly a good data point, it's not quite testing the same thing, but for lack of other testing it's better than nothing!
The problem is I can reproduce it here, so I'm trying to figure out how to do that.
So we're at least at the same starting point, can we test the same file? There are several online spots that allow you to download test files. For example, http://www.demo-world.eu/2d-demo-trailers-hd/ 2D Demo Trailers (HD) , http://thedigitaltheater.com/index.php/dts-trailers/ DTS Demo Trailers (DTS:X, DTS-HD MA, DTS 7.1, DTS 5.1) , http://jell.yfish.us/ Jellyfish Bitrate Test Files , and http://kodi.wiki/view/Samples http://kodi.wiki/view/Samples .
I do have the demo files from them as well, what I noticed were streams that were only "Dolby Digital 5.1 or DTS Core 5.1" had the tendency for the issue to occur. Whereas streams with "Dolby TrueHD or Dolby ATMOS, DTS HD-MA or DTS X" had no such issues. Have you attempted to replicate the problem by just playing simple audio file through a bitstream capable amplifier ? Because the issue tends to occur lesser with bitstream audio, it's more frequent on pure PCM stereo streams.
For the records:
OS : Windows 10 Pro 64bit @ Anniversary update
MPC : version 1.7.10 64bit
No other software decoders used besides the one that came with MPC.
Update: I tried the following files from Jellyfish
1. http://jell.yfish.us/media/jellyfish-55-mbps-hd-h264.mkv http://jell.yfish.us/media/jellyfish-55-mbps-hd-h264.mkv - video playback was fine, random audio glitches
2. http://jell.yfish.us/media/jellyfish-140-mbps-4k-uhd-hevc-10bit.mkv http://jell.yfish.us/media/jellyfish-140-mbps-4k-uhd-hevc-10bit.mkv - video playback stuttering, blank audio for first half of the playback as the audio stream is constantly glitching
3. http://jell.yfish.us/media/jellyfish-400-mbps-4k-uhd-hevc-10bit.mkv http://jell.yfish.us/media/jellyfish-400-mbps-4k-uhd-hevc-10bit.mkv - video playback stuttering, no audio besides the NUC's fan whirring up to maximum
Now at least we'll be trying the same files.
Just to confirm, you have not changed the video, correct? It's still 3840x2160 @ 60Hz?