Advice, please - how to get audio to a TV via DisplayPort?

Forums › Home Theatre (including HTPC and EPG Collector) › Advice, please - how to get audio to a TV via DisplayPort?

jonathan18

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#272681 9-Jul-2020 09:37

So my work unit has purchased a TV so as to be able to use for presentations, MS Teams etc; we have a computer attached to it via the only video digital out it has - DisplayPort, for which I purchased a DisplayPort to HDMI cable. Video works fine, but there's no audio.

We don't care too much about quality (TV speakers and all!) so even running analogue audio between the TV and computer would be fine, but I can't find any way on the TV (a basic but new Samsung LCD) to assign the single analogue audio input to a different digital video input, like one could do on a receiver.

So does anyone have any ideas as to what could be causing this problem, and if there any solutions that don't require the use of our IT department? (which provided a DVI cable with a DisplayPort adapter, so not even capable of plugging in!)

I've got no way to test the DisplayPort/HDMI cable on another device to see if it does indeed carry audio (eg my own monitors have HDMI in but have no speakers), but I assume they'd not produce a cable that only carried video...

I understand that DisplayPort can carry audio, but there's no indication in Windows' audio settings its actually outputting it in this case; could it be that the IT team haven't enabled it, the driver needs updating, or simply this model of computer (it ain't new!) doesn't support audio over DisplayPort?

Thanks for any ideas.

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#2519855 9-Jul-2020 10:08

As daft as it may sound, check device manager. There should be 2 drivers. Can't recall if both fall in the audio or video section.

An Intel(R) Display Audio (really audio) looking video device, and whatever it really has

I've had similar cases where yep, it needed the Intel HD Video(really audio) driver updated so it could use it when the external video was kicked in as an audio output device option. Apparently earlier editions where it was v1 spec didn't include it. Or they get disabled/hidden in the classic audio device menu and need to be put back to enabled.

Run msinfo32 or similar and see if you can work out the core chipset. Soon find if it supported it or not, was only later generation Intels that started to. Else they needed to be offloaded to external graphics card

Rikkitic

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#2519857 9-Jul-2020 10:11

Check the audio playback configuration in Windows. That is where this kind of issue usually resides. Try the different options available to see if any produce sound.

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ShinyChrome

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#2519913 9-Jul-2020 11:11

Probably a bit late for this, but if you use Win-10 based computers, I would ditch the cables and look into a wireless casting device. We use these at work; a bit more expensive than a cable, but that shiz just works for everyone and no dossing about.

jonathan18

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#2519965 9-Jul-2020 11:24

Thanks for the ideas. Looked into the device manager, and yeah I’d read the audio in this context should show under video, but under display adapters there’s just a single listing. (Assume display adapters is where I should be looking?)

Device manager and msinfo report it as a q45/q43 express chipset (do I need more detail than that?). Searching that I cam across this (someone else with exactly the same issue), which I read as acknowledging it will output audio over DisplayPort, but Intel saying an ‘active’ converter was required.

https://community.intel.com/t5/Graphics/Can-t-get-displayport-to-output-audio-to-HDMI-Q45-Q43-Express/td-p/285487?profile.language=en

I imagine my cable, sourced from NL, is just passive! So would it be worth trying something like this along with an HDMI cable?

https://www.pbtech.co.nz/product/ADPJ5C3158/J5create-JDA158-DisplayPort-to-4K-60Hz-HDMI-Active?gclid=Cj0KCQjw3ZX4BRDmARIsAFYh7ZLvMhbe7_v8lWc0edhJzB4364BChdGRX_2e9VtO8NsTLTNaGNi-CSsaAgFBEALw_wcB

Thanks for further ideas...

jonathan18

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#2519973 9-Jul-2020 11:32

ShinyChrome:

Probably a bit late for this, but if you use Win-10 based computers, I would ditch the cables and look into a wireless casting device. We use these at work; a bit more expensive than a cable, but that shiz just works for everyone and no dossing about.

Thanks for the idea... the problem I see is that the PC they’ve given us has no WiFi capability (I had asked for this but...), which I assume we’d need to be able to use it?

The TV is on a stand, with a bracket holding the two computers directly below the screen so the idea is for it to be a standalone system. (Our work computers don’t have direct access to the internet.)

trig42

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#2519974 9-Jul-2020 11:36

Just get some cheap PC speakers and plug em into the computer.

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ShinyChrome

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#2520003 9-Jul-2020 12:24

jonathan18:

Thanks for the idea... the problem I see is that the PC they’ve given us has no WiFi capability (I had asked for this but...), which I assume we’d need to be able to use it?

Ah, yes that's definitely a hitch for wireless casting haha. As you where!

jonathan18

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#2520006 9-Jul-2020 12:31

trig42:

Just get some cheap PC speakers and plug em into the computer.

Yep, that’s the current (and ideally temporary) solution, but they’re borrowed from another unit. My completist nature makes me want to solve this problem if at all possible, and an active adapter is still going to be cheaper than speakers (if that indeed is the problem.)

That said, anyone have an recommendations for such speakers that are cheap but also produce a decent and loud enough sound to fill a moderately-sized room?

MikeAqua

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#2520077 9-Jul-2020 13:23

I've had a laptop with the dreaded DP connection (and one with mDP too!)

DP to HDMI cable has always done the trick, but you have to go into audio devices (just search sound in settings) and control where the sound is going.

Mike

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#2520084 9-Jul-2020 13:44

To start assume on W10 can you right click the speaker in bottom right corner. Select 'Open Sound Settings'.

In the 'Choose your output Device' drop down what options can you see there?

jarledb

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#2520094 9-Jul-2020 14:14

jonathan18:

That said, anyone have an recommendations for such speakers that are cheap but also produce a decent and loud enough sound to fill a moderately-sized room?

You should look at Logitech speakers. I see you can get a pair from $35 and up at PBtech (and probably most any other computer store).

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jonathan18

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#2520131 9-Jul-2020 15:01

I've re-checked all sound options (yep it's running Win 10 Enterprise), and the only audio outputs showing are the 3.5mm analogue ports (front and back), ie no option to select audio over DP.

I imagine it comes back to the lack of the necessary driver or perhaps an out of date driver, and/or the lack of an active converter. To check whether it's a driver issue I'll need to contact the IT team, so that's the next step.

Thanks for all the help so far!

K8Toledo

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#2520760 10-Jul-2020 13:44

jonathan18:

Thanks for the ideas. Looked into the device manager, and yeah I’d read the audio in this context should show under video, but under display adapters there’s just a single listing. (Assume display adapters is where I should be looking?)

Device manager and msinfo report it as a q45/q43 express chipset (do I need more detail than that?). Searching that I cam across this (someone else with exactly the same issue), which I read as acknowledging it will output audio over DisplayPort, but Intel saying an ‘active’ converter was required.

https://community.intel.com/t5/Graphics/Can-t-get-displayport-to-output-audio-to-HDMI-Q45-Q43-Express/td-p/285487?profile.language=en

I imagine my cable, sourced from NL, is just passive! So would it be worth trying something like this along with an HDMI cable?

https://www.pbtech.co.nz/product/ADPJ5C3158/J5create-JDA158-DisplayPort-to-4K-60Hz-HDMI-Active?gclid=Cj0KCQjw3ZX4BRDmARIsAFYh7ZLvMhbe7_v8lWc0edhJzB4364BChdGRX_2e9VtO8NsTLTNaGNi-CSsaAgFBEALw_wcB

Thanks for further ideas...

You'll need to do one or more of the following: change the OS default sound device, select the output device in the application, or install the graphics drivers.

I've got a Q45 on the shelf behind me, I'll check & brb.

What is the software you're running?

sqishy

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#2520826 10-Jul-2020 15:37

jonathan18: I've re-checked all sound options (yep it's running Win 10 Enterprise), and the only audio outputs showing are the 3.5mm analogue ports (front and back), ie no option to select audio over DP.

I imagine it comes back to the lack of the necessary driver or perhaps an out of date driver, and/or the lack of an active converter. To check whether it's a driver issue I'll need to contact the IT team, so that's the next step.

Thanks for all the help so far!

Hi, I don't think you did what I said, you need to see sound output options:

jonathan18

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#2520842 10-Jul-2020 16:07

Yep, I certainly did check that; the only option from that menu, as in every place I looked, is the analogue audio out.

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