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DVI to HDMI adapter audio conundrum?

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November 25, 2008 1:57:00 AM

Most video cards with DVI jacks also come with -- one -- DVI to HDMI adapter. So far as I can tell the only difference between the two is that HDMI has audio, and DVI does not.

These adapters I'm sure convert the jack type for the sake of video, but what about audio? If they do audio too then how is it that a DVI plug outputs audio?

If will I have two monitors with speakers and HDMI input, how will the audio get to them?

More specifically, my PC has onboard audio and video to run one monitor and one set of speakers. Onto it I will be inserting a video card in order to drive two monitors (with speakers and ATSC tuners). I'd like to think that the new video card will have two video channels and two audio channels, or at least one audio channel that's split between the two.

Perhaps it's best to use the onboard audio, split it and route it to the two monitors? Are two separate audio channels even possible, or should I ignore the monitor speakers -- for normal PC use -- and use external speakers? I don't know.

How can audio get to two monitors? Thanks for your help.
November 25, 2008 3:04:56 AM

i think you are talking about ATI videocards with an integrated sound chip on the videocard. that is why it can output video and audio on HDMI. i think NVidia videocards can only output video if you use the DVI to HDMI adapter. correct me if i'm wrong.

i believe that DVI and HDMI share the same signal. they just have a different connector. that is why you have a DVI to HDMI adapter.

about the two monitors with speakers? i think you should use external speakers with your onboard audio.

when you insert a videocard. you should disable your onboard video. then connect both monitors to the DVI connectors on the videocard.

also, i don't think videocards are supposed to output audio or have audio channels. that is why there are soundcards out there. unless you are using an ATI videocard (with an integrated sound chip) on HDMI. that is a different case.
November 25, 2008 3:09:40 AM

Two quick and easy things:

1. Onboard speakers in monitors usually suck pretty bad, externals are usually much better for pretty cheap.
2. Audio can be outputted over DVI as long as it's a newer ATI video card (not NVidia) using PCI-Express

But as far as the dual DVI->HDMI Adapters carrying audio and video - that sounds quite interesting and have no idea.
Related resources
December 30, 2008 2:31:10 PM

I've been trying to figure out if ATI's adapter is special... I can't get audio over HDMI with a generic DVI to ADMI adapter cable (ATI 4850), though I haven't ruled out all other potential problems... only thing is, there aren't data channels specific to audio on the HDMI connection, so I can't see how this would be so. There is, however, an I2C bus and some CEC channel that are on HDMI and not DVI, so maybe without the special adapter the two devices can't talk and get properly configured...
January 8, 2009 6:04:36 AM

I have a with a DVI and a HDMI output. I also have 2 monitors accepting DVI input only. My question is: Is it better to:
1) connect the monitors with DVI cables with one of them going to the HDMI output via a HDMI-DVI adaptor
2) or get a "HDMI Male to DVI-D Female X 2" cable like shown on http://www.monoprice.com/products/product.asp?c_id=101&... and feed both monitors from one HDMI outlet.
Thanks very much.

Cheers,
Anthony
a b U Graphics card
a b C Monitor
January 8, 2009 8:04:57 AM

First of all there are nV cards that will do HDMI Audio via DVI adapters, but they are rare with a SPDIF passthrough that runs back into the card from the external audio card/source and will only support up to 5.1 audio (SPDIF limitation), while the HD4K does 7.1.

Second, yes AMD and nV use special adapters that use some of the additional pins to send data for the audio channel, they are different than the standard adapters.

Lastly, I would suggest just do the one HDMI->DVI conversion and hook up the monitors separately, the monoprice splitter means you can only clone the displays not span (have two separate desktops).
January 8, 2009 6:52:33 PM

Thanks TheGreatGrapeApe! I didn't realize that the splitter can only create clones, not spanning the desktop space. This make a huge difference. Cheers.
a b U Graphics card
a b C Monitor
January 8, 2009 9:35:19 PM

I would say no. Technicially it's an additional interfaces conection, so like any connection, there's potential for oxidization or dirty or even the bazillionth of a fraction (exageration) difference in different metal to different metal contact conduction at the adapter points, but overall both should provide an equally good picture.

I tend to use single solutoins for one main reason other than that terrible bazillion of a fraction problem ;)  and that's because I LOSE little tiny dongley things like that when I do things like plug/unplug, etc.

But if you're connecting it once and never really touching it much again other than to deal with just one end, then even that's not much of an issue.
March 11, 2009 3:36:39 PM

TheGreatGrapeApe said:
First of all there are nV cards that will do HDMI Audio via DVI adapters, but they are rare with a SPDIF passthrough that runs back into the card from the external audio card/source and will only support up to 5.1 audio (SPDIF limitation), while the HD4K does 7.1.

Second, yes AMD and nV use special adapters that use some of the additional pins to send data for the audio channel, they are different than the standard adapters.

Lastly, I would suggest just do the one HDMI->DVI conversion and hook up the monitors separately, the monoprice splitter means you can only clone the displays not span (have two separate desktops).



Could you please specify which nV cards you think can output HDMI Audio via DVI adapters? I had to replace a noisy fan nV 9500GS, which has HDMI output connector on the board with audio, with an EVGA 9500GT which has two dual DVI connectors on card. EVGA says it is HDCP certified and provides an audio-pass through white 2 pin connector internally on card for pass through from motherboard like used with old card. What I would need to know is, what and whose DVD to HDMI adapter plug would I need to buy or even if this board can do audio over HDMI (using adapter DVI to HDMI)? I am still waiting for a reply from EVGA on this question. Seeing your above statement gave me some hope that there might be some kind of solution. TIA
a b U Graphics card
March 11, 2009 6:00:56 PM

Everyone, STOP!

DVI and HDMI are electronically compatable, but only HDMI can carry audio. DVI CAN NOT CARRY AUDIO SIGNALS, PERIOD!

ATI cards and some NVIDIA cards feature an HDMI IN that will take a HDMI audio signal (either directly with ATI, or with an internal SPDIF cable that connects to the motherboard with NVIDIA). So theoretically, you can take a HDMI signal, decode the audio portion, and output the video to a moniter using DVI. The audio signal, however, will be handled internally and is not re-transmitted.

Also, there should be zero compatability issues using a HDMI->DVI/DVI->HDMI adaptor, as for video, they are the exact same signal, just a diffrent port. You can get some signal degregation due to the adaptor itself though...
March 11, 2009 6:30:11 PM

On a single HDTV my hd4870 works great. I am using the DVI to HDMI converter and I get the sound and the video through one cable. You just have to go into the sound card properties and enable SPDIF.

I am not sure though about using the Dual Monitor ... I dont know if the sound is ported through both of the DVI ports on the card....?
a b U Graphics card
March 11, 2009 7:20:39 PM

Euphoria_MK said:
On a single HDTV my hd4870 works great. I am using the DVI to HDMI converter and I get the sound and the video through one cable. You just have to go into the sound card properties and enable SPDIF.

I am not sure though about using the Dual Monitor ... I dont know if the sound is ported through both of the DVI ports on the card....?


Spdif is carried on another cable, and carries only an audio signal. Your sound is being routed from elsewhere, not over DVI, especially if it takes a Spdif option to get the signal to go.

I know the 4000 series does something with audio and HDMI, but i'm not fimmiliar with how it works. I can tell you, the audio signal is not comming past the DVI converter.

http://en.wikipedia.org/wiki/Digital_Visual_Interface

Quote:
Unlike HDMI, DVI usually carries no audio data
March 11, 2009 7:46:43 PM

gamerk316 said:
Spdif is carried on another cable, and carries only an audio signal. Your sound is being routed from elsewhere, not over DVI, especially if it takes a Spdif option to get the signal to go.

I know the 4000 series does something with audio and HDMI, but i'm not fimmiliar with how it works. I can tell you, the audio signal is not comming past the DVI converter.

http://en.wikipedia.org/wiki/Digital_Visual_Interface

Quote:
Unlike HDMI, DVI usually carries no audio data


Read the ATI documentation, I think they use the middle wires to transfer audio, compare the DVI to HDMI adapter from the NVIDIA cards to the DVi to HDMI adapter from the HD4870, and you'll see the difference.

I dont have any other cable connected to my HDTV except the HDMI cable.

This is only done on ATI 4870 and I think 4850 cards, and thus does not follow the official DVI standard that is implemented on other cards or media products.

EDIT:

Also in the quote you wrote, it says that DVI "usually" does not carry audio, but that does not mean that it can not carry the audio signal.


Cheers
April 7, 2009 5:00:28 PM




We cannot just say it wont, by standards it should not . Basically Standards are made to make components compatible with other products. Here, thats not the case. Here ATI did some connection modifications to work that way, it wont reduces the bandwidth either...You can also just cut a DVI cable and use it for your own custom audio project...it just a matter of connection. It's a pinout issue. ATI has done some custom mapping of their DVI port to support a dvi-hdmi connection that carries audio. The only thing you need is custom adapter from ATI too inorder to understand what goes where. An ordinary DVI HDMI adapter may not work.

a b U Graphics card
April 7, 2009 7:46:16 PM

The question then becomes this:

If you do HDMI->DVI, even if you find a way to carry the audio singal over a DVI connection, how does the input device interpret that signal. That's the other point you are all ignoring; Even if you can find a way to carry an audio signal over a DVI connection, how does the input device seperate an audio signal that is not supposed to exist? This is especially important, given the way DVI inputs are used on most moniters...
April 7, 2009 8:31:56 PM

gamerk316 said:
The question then becomes this:

If you do HDMI->DVI, even if you find a way to carry the audio singal over a DVI connection, how does the input device interpret that signal. That's the other point you are all ignoring; Even if you can find a way to carry an audio signal over a DVI connection, how does the input device seperate an audio signal that is not supposed to exist? This is especially important, given the way DVI inputs are used on most moniters...


Simple if the device is not made to accept audio signal then it wont do anything to it.

Where does it say that Audio signal is not suppose to exist? It says that DVI "usually" does not contain audio signal, but that does not mean that it can not be included under a DVI connection.

Usually != Never
a b U Graphics card
a b C Monitor
April 8, 2009 6:58:27 AM

gamerk316 said:

I know the 4000 series does something with audio and HDMI, but i'm not fimmiliar with how it works.


Then perhaps you should keep that ignorance to yourself and stop posting ! [:thegreatgrapeape:6]

Seriously, why are you contributing to this thread if you admit you aren't 'fimmiliar' with how it works? [:thegreatgrapeape:2]

Quote:
I can tell you, the audio signal is not comming past the DVI converter.


I can tell you it is. So can many others who have either ATi or nV cards that use the data pins to send audio data to the DVI connector to be converted to HDMI by an adapter, it needs to be specific adapters but it's DVI. How do you think you get 5.1 audio on the HD2/3K and 7.1 on the HD4K ATi cards through their HDMI dongle, they're not connected to anything other than the DVI port. [:thegreatgrapeape:5]

nVidia does the same with SOME of their cards, using the SPDIF input to combine with video to send out the DVI port on their own method of inserting it in between the video signal, which can require a proprietary connector as well, but can someitmes use generic DVI-HDMI adapters. Most GTX 285 cards I've seen ship with the pass-through option, like the XFX model reviewed here at launch which mentions it at the bottom of the first page of the review;
http://www.tomshardware.com/reviews/geforce-gtx-285,213...

The nV cards offer the SPDIF pass-through, the ATi cards offer internal pass-through with the SPDIF mode being an option, but they also provide the protected path option which allows for additional audio support including DTS-HD & Dolby Tru HD on the HD4K series. Although they are limited to one audio out path at a time.

Next time don't spoil threads by undoing the constructive posts that precede your uninformed nonsense.
a b U Graphics card
a b C Monitor
April 8, 2009 7:19:07 AM

lee67 said:
Could you please specify which nV cards you think can output HDMI Audio via DVI adapters? I had to replace a noisy fan nV 9500GS, which has HDMI output connector on the board with audio, with an EVGA 9500GT which has two dual DVI connectors on card. EVGA says it is HDCP certified and provides an audio-pass through white 2 pin connector internally on card for pass through from motherboard like used with old card. What I would need to know is, what and whose DVD to HDMI adapter plug would I need to buy or even if this board can do audio over HDMI (using adapter DVI to HDMI)? I am still waiting for a reply from EVGA on this question. Seeing your above statement gave me some hope that there might be some kind of solution. TIA


You MIGHT need to use the one specific to EVGA's setup. Unfortunately not all of them are made the same it seems, since some people have tried a Zotac (one of the first that had coax and toslink pass-throughs as well) adapters on other models and they don't work. I've seen a bunch of people have issues (and about as many try a generic adapter on an ATi card) on the AVS forum trying to find compatible adapters for a card that's rarer in their market/region.

Some of them can use any DVI->HDMI adapter others require specific connectors. However unlike the ATi it's not a 100% requirement, because they send the signal differently.
August 11, 2009 7:47:21 AM

Of course DVI can transmit audio. HDMI and DVI are the have the same configurations.
I am using a dvi to hdmi cable (3 meters) out to my 55inch plasma with full digital audio & 1080p output.
I then output from the TV to my receiver and viola 7.1 surround sound AC3 and DTS.

On another machine (Zotac ION) I am attempting to figure out how to disable the audio from the DVI because it is interfering with my optical output to another device.


gamerk316 said:
Everyone, STOP!

DVI and HDMI are electronically compatable, but only HDMI can carry audio. DVI CAN NOT CARRY AUDIO SIGNALS, PERIOD!

ATI cards and some NVIDIA cards feature an HDMI IN that will take a HDMI audio signal (either directly with ATI, or with an internal SPDIF cable that connects to the motherboard with NVIDIA). So theoretically, you can take a HDMI signal, decode the audio portion, and output the video to a moniter using DVI. The audio signal, however, will be handled internally and is not re-transmitted.

Also, there should be zero compatability issues using a HDMI->DVI/DVI->HDMI adaptor, as for video, they are the exact same signal, just a diffrent port. You can get some signal degregation due to the adaptor itself though...

September 4, 2009 7:11:13 AM

I just purchased a Zotac GeForce 9500GT. It has two dvi ports and another port that connects to an adapter for s-video and component video. It comes with the SPDIF cable to connect from the motherboard to the sound card. It is clear there is no sound out through the s-video or component but I would assume that the reason for including the SPDIF cable is to pipe the sound through the DVI port into the Zotac branded HDMI adapter. I dont have it setup yet but I will post back when I do.

By the way, on the box it says "DVI Audio"
Anonymous
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September 13, 2009 11:43:55 AM

I'm having the same problem with no audio from my dvi/hdmi adapter. But I recently found out that there is in fact a special dvi to hdmi with audio adapter.

The problem is, not all graphic cards ship with them. Mainly the cards bought in stores. But if you search the net, like tigerdirect.com, they tell you in the specs which cards include the adapter.

I have a radeon 4650 made by HIS, and this is the info I got from there website. And this is the crazy part. It list the product code for the special dvi to hdmi with audio adapter, but it doesn't include it. It includes a useless dvi to vga adapter???

I guess they want us to buy it. But in any case, there is a special adapter needed, and the product code is below for the part if you want to buy it, but it doesn't list the price. I guess you have to call to find out

http://www.hisdigital.com/un/product2-52.shtml

•Built-in HDMI with 7.1 surround sound support
◦The HIS DVI to HDMI Adapter for ATI 4000/ 3000 series (Product Code: HHDMI4071) is required to fully utilize the audio through HDMI features
•Support for the ATI RadeonTM DVI to HDMI adapter

ACCESSORIES
SOFTWARE BUNDLED
•Driver Disc

CABLE/ADAPTOR BUNDLED
•DVI to VGA adapter
Anonymous
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a b C Monitor
September 13, 2009 11:59:48 AM

Sorry, I spoke too soon. I just did some more searching, and this is what I found on Visontek website. They are one of they main companies that claim audio through dvi.

If this part doesn't work, than the whole audio through dvi is one of the hughes scams ever

http://www.visiontek.com/store/catalog/product_info.php...

DVI to HDMI Adapter - HD3000/4000 series
[PN.400405] $9.99

ATI DVI to HDMI adapter. This adapter will enable HDMI audio/video through the DVI output of the Radeon HD 3000/4000 series PCI-Express boards.
> This adapter is NOT compatible with the HD2000 Series video cards.
September 13, 2009 2:48:47 PM

ATI is very different than NVDIA in the way they carry audio through the DVI
October 14, 2009 11:18:42 PM

Twelve months ago I bought a 25 metre HDMI cable for computer out to lounge 48" HDTV to test run full size of Edius Editing work. Fitted (yellow) HDMI Adapter(Supplied) to Yellow DVI on Asus 9600GT hdmi card.
No sound---- so into forums---no useful answers----only opinions. I had the Audio link from my Asus P5Q Pro Mob connected. Still nothing. Noticed in data that MOB plug out reffered to as SPDIF/HDMI ! H'mmmmm......
Entered Bios, found SPDIF selected, changed to HDMI. Now HDMI appeared back in Sound Card (onboard) properties . Good. Reconnected, rebooted, ------- nice sound at TV! I'm told reversing jumper to card 2 pin also counts but not checked this yet. I specify 5.1 sound for my DVDs--- fine on most TVs(Stereo) but may yet offer alternative 7.1 audio track for the odd client who has some fancy Home Theatre rig.
One other thing---my 5D Mk11 Canon goes intermittent on cheap 2 mt mini to full HDMI cable but perfect on "expensive". Damn !
Cheers Eric NZ
December 16, 2009 3:04:02 AM

How about you check the pins on the connector from DVI to HDMI. Might have something to do with sound....
Anonymous
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December 16, 2009 8:10:10 PM

I have an and ati 4870 x2 and the hdmi adapter provided by ati carries the audio to my receiver, then passes the video thru to the hdtv. I have a second monitor connected via hdmi useing a second adapter bought online. The problem is that I am not getting audio thru to the monitor. Do ati cards only output audio thru 1 connection? The adapter I bought is the same ati adapter.
Anonymous
a b U Graphics card
a b C Monitor
December 20, 2009 5:58:52 PM

Actually the poster who claimed that DVI cannot carry audio was almost correct. DVI is a standard layer1 signalling protocol defined by Silicon Image, Inc. Unlike HDMI, the DVI standard does not define a means for transmitting audio.

That doesn't mean audio can't be transmitted via a DVI style plug, but it does mean that since there is no standard for doing so, every manufacturer may come up with their own unique way of doing it. If they violate the standard to make the audio work (e.g. by using pins reserved for the second link on a single link adapter), then one could argue that the interface is no longer DVI, even if the plug looks like a DVI plug. And if they don't technically violate the standard (e.g. by encoding the audio in the TMDS channel), it's probably still not guaranteed to work with all hardware.
January 6, 2010 2:41:35 PM

I am using ATI's DVI to HDMI adapter, a 50ft HDMI cable and plugged into my TV. Audio and Video transfer to the TV (cloned desktop). My issue, which I cannot seem to find a solution for...When I am connected to the TV the audio transfers, and is no longer available through my computer speakers. I am guessing that it is re-routing the audio via the PCI-e bus? This all makes a little bit of sense to me until...i open Windows Media Center. When I am navigating in Media Center the sound effects of the Media Center application only come over through the computer (which I like). Then when I select the movie I want to watch the audio comes through the TV...perfect. BUT...if I am not in Media Center ALL of my audio is going through the TV via HDMI, including alert message sounds, etc in Windows.

My question: How do I maintain audio on the computer speakers AND the TV when the HDMI cable is plugged in? I have to physically unplug to get audio back to the computer. Thanks.

...pardon my ignorance.
January 6, 2010 7:50:06 PM

wernersl said:
I am using ATI's DVI to HDMI adapter, a 50ft HDMI cable and plugged into my TV. Audio and Video transfer to the TV (cloned desktop). My issue, which I cannot seem to find a solution for...When I am connected to the TV the audio transfers, and is no longer available through my computer speakers. I am guessing that it is re-routing the audio via the PCI-e bus? This all makes a little bit of sense to me until...i open Windows Media Center. When I am navigating in Media Center the sound effects of the Media Center application only come over through the computer (which I like). Then when I select the movie I want to watch the audio comes through the TV...perfect. BUT...if I am not in Media Center ALL of my audio is going through the TV via HDMI, including alert message sounds, etc in Windows.

My question: How do I maintain audio on the computer speakers AND the TV when the HDMI cable is plugged in? I have to physically unplug to get audio back to the computer. Thanks.

...pardon my ignorance.


When you extend or clone your desktop to the TV. Windows Display Options/ATI Catalyst should automatically choose HDMI audio output in your volume control/playback devices. When you disable your TV in Windows Display Options/ATI Catalyst, audio output should revert back to your default audio/computer speakers. There is no need for you to unplug and replug your HDMI cable. To manually control your audio output right click on your volume icon on the taskbar and change your playback devices.

However, you should not be able to play audio through both HDMI and the computer speakers at the same time. I haven't found a solution to that yet, it seems that Windows does not have this option to play audio through many audio devices at the same time or have the ability to manually control sound through each audio device.

Also, I'm pretty sure Windows Media Center is playing sound effects through your TV (extend or clone) on HDMI and not through your computer speakers. I'm testing it on my computer and TV right now. What Windows version are you using?
January 23, 2010 2:06:36 AM

I bought a GeForce GTS 250 video card and on the back of the box it says:

NVIDIA 2-way and 3-may SLI ready
NVIDIA PureVideo HD technology
NVIDIA PhysX ready
NVIDIA CUBA technology

so Given what has been said because it is NVIDIA I will not be able to get sound through an HDMI cable with this card? Also, I do not know what most of the terminology means if you could enlighten me it would be greatly appreciated.
February 19, 2010 8:25:21 PM

I'm following this thread because I am having the same trouble.

I have a msi GTX 275 that came with a DVI-HDMI converter cable and a SPDIF cable. I have connected the SPDIF cable from the mobo to the graphics card. A toshiba tv is attached to one of the DVI ports with an HDMI cable and the DVI-HDMI converter. Still no sound from the tv. I've checked all the audio settings within Windows 7 and still cannot get the audio to pass over the HDMI cable. Any suggestions that might solve this problem?


February 19, 2010 11:51:08 PM

ATI videocards have an integrated sound chip to output audio and video through the HDMI. Nvidia videocards can only output video through HDMI.

You cannot use a generic DVI-HDMI converter because ATI's DVI-HDMI converter pins are placed differently (which allows sound and audio through HDMI).

I hope this answers some questions.
February 20, 2010 2:27:59 AM

eas2275 said:
I'm following this thread because I am having the same trouble.

I have a msi GTX 275 that came with a DVI-HDMI converter cable and a SPDIF cable. I have connected the SPDIF cable from the mobo to the graphics card. A toshiba tv is attached to one of the DVI ports with an HDMI cable and the DVI-HDMI converter. Still no sound from the tv. I've checked all the audio settings within Windows 7 and still cannot get the audio to pass over the HDMI cable. Any suggestions that might solve this problem?

Have you tried the other DVI port? HDMI sound only works on one of the DVI ports, not both.
Have you double checked the SPDIF cable on the motherboard is correct also?
February 21, 2010 1:43:31 AM

ati does ouput audio with the dvdi to hdmi adapter, however, use the adapter included in the box. i ahd a very expensive dvi-hdmi converter that would not output sound. once i changed it to the adapter included with the card...Bam i had sound. also, built in speakers are generally horrible. but it all depends on the make and model of the monitor u will b using so take that into account. you would not want to disable the onboard audio because it does have functions that the hdmi thru the ati vard does not have. for example.....audio input. where would you connect ur microphone for in game voice talk? what if you wanted to use the line in to record a guitar track? so i think disabling the onboard audio is a bad idea. using sound in the control panel u can configure ur augio out preference. in my case i select the ati hdmi rear output over the dvdi-hdni adpater but still use default onboard device for capturing audio. is: sonar cakewalk etc.
a b U Graphics card
a b C Monitor
February 21, 2010 5:16:33 AM

aylafan said:
ATI videocards have an integrated sound chip to output audio and video through the HDMI. Nvidia videocards can only output video through HDMI.


Wrong! Read above it's already been explained to you so stop posting the same wrong thing you did the first time. :pfff: 
February 21, 2010 8:05:16 AM

TheGreatGrapeApe said:
Wrong! Read above it's already been explained to you so stop posting the same wrong thing you did the first time. :pfff: 


I'm not entirely wrong. I already know that Nvidia videocards can output audio with SPDIF through HDMI, but that is most likely if you have a compatible external soundcard with SPDIF or with a motherboard with SPDIF, which most people still don't have. Also, that doesn't guarantee that audio will output through SPDIF and HDMI due to different pin positions on generic DVI-HDMI converters. As you can see that many people are still having problems with that. Maybe, I shouldn't say that "Nvidia videocards can only output video through HDMI", but that it is not a reliable solution for everyone and can be problematic. It's not impossible, just not a practical solution for the majority of people.
a b U Graphics card
a b C Monitor
February 21, 2010 12:04:39 PM

aylafan said:
Also, that doesn't guarantee that audio will output through SPDIF and HDMI due to different pin positions on generic DVI-HDMI converters.


Actually, alot of people in the AVS forums have tested the NV solution with a myriad of converters and actually it's converter independant, unlike the ATi solution that requires the ATi converter. The nV solution passes it along the TMDS signal which makes it more universal, but also limits the signal to SPDIF options (which would allow fors 5.1 DTS, DD, and then whatever PCM is processed and supported end to end) thus the audio limitations on nV unlike AMD's solution.

Quote:
It's not impossible, just not a practical solution for the majority of people.


Which would've been a far better way to put it, and that part I'd agree with, because your other statement makes it sound impossible and really HTPC and HDMI users are not the majority to begin with, so like multi-monitor while not practical for the majority, those that are wanting to do it, aren't limited to AMD/ATi, it is quite possible for them to do it too, and it can be as easy as a $30-50 add-in audio card that supports multi-SPDIF output options, similar to the Xonar one forum member drpcken pointed out in another thread which has helped alot of people here;

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

For many people it's a better solution to stick with the graphics card they prefer and add that card than to switch to AMD/ATi. If all it is is adding HDMI support for TV or basic surround sound, then that will do perfectly, if they want better audio support, then they may have to move to ATi or consider something like the Azentech HDMi option, but the thing is to make sure they have all the facts so they can make an intelligent choice, not limit their information because we assume it may not be practical for them because it isn't for others.

So IMO it may not be practical for most, but possible for those who care enough to do it. M'kay? [:jaydeejohn:5]
March 3, 2010 5:17:44 PM

Maybe someone can help me. I just purchased the dvi to HDMI adapter and i'm having problems. I have a bedroom TV and a main TV that I want to duplicate the monitor so when I am in my bedroom I can watch TV and also If I'm in the living room I can watch the same computer. Currently I am running the HDMI straight out of my Radion 5770 to my Onkyo HT-S9100THX receiver. It is 7.1 surround and working perfectly. I have confirmed that the adapter does carry sound by hooking this HDMI to the adapter. My problem starts when I hook up my bedroom TV. It does not matter if I hook it up alone or if I hook it up and duplicate the displays no matter which way I hook it up I am not getting any sound through my bedroom TV (Its a 32 inch Dynex). I am getting picture just no sound. Can someone please help?


Thank You
a b U Graphics card
a b C Monitor
March 10, 2010 4:11:20 PM

Nice to see someone make a combo pack, especially since the usual missing-link the SPDIF connector likely costs them 25 cents.
March 20, 2010 2:25:14 PM

Wow i have never seen a post with so many wrong answers in my life. This is completely possible, and exceptionally easy.

I was able to set this up on my desktop machine in 10 minutes, just took long to find the audio cable.

I have a asus p5b deluxe motherboard. The board has a spdif header on it. I also have a asus 9800 gtx video card. EN9800GTX

Like most 9800 gtx video cards there is a small 2 port spdif in on the top of the card. Usually un-used because most cards dont come with the cable. I connected an audio cable from the motherboard to the ports on the card.

I am using a standard 25 foot - dvi to hdmi video cable, that i picked up from a computer show. Gold contacts but nothing fancy.

Connecting to a sony kds50xbr1 television. Audio works perfectly in games and regular windows. I havent tested movies. According to nvidia control panel hdcp is ok.

This entire mod cost less that 2 dollars, you just need a old school audio spdif cable, the same cable you used to connect cd-rom's to sound cards. It should have 2 ports. I had to take them out of the plastic connector because it was too big for the card, but it still connected perfectly.
April 6, 2010 4:39:23 PM

gamerk316 said:
Everyone, STOP!

DVI and HDMI are electronically compatable, but only HDMI can carry audio. DVI CAN NOT CARRY AUDIO SIGNALS, PERIOD!

ATI cards and some NVIDIA cards feature an HDMI IN that will take a HDMI audio signal (either directly with ATI, or with an internal SPDIF cable that connects to the motherboard with NVIDIA). So theoretically, you can take a HDMI signal, decode the audio portion, and output the video to a moniter using DVI. The audio signal, however, will be handled internally and is not re-transmitted.

Also, there should be zero compatability issues using a HDMI->DVI/DVI->HDMI adaptor, as for video, they are the exact same signal, just a diffrent port. You can get some signal degregation due to the adaptor itself though...


That is completely false. I currently have an ati 4800 series with a cable that's DVI to HDMI and I have the audio playing through my TV. Do some research before you ignorantly troll a forum. Please stop spreading your ignorance.
May 12, 2010 9:54:01 AM

So I now understand that I cannot have my HIS radeon 4350 onboard audio out to my HDMI TV and the motherboard onboard audio to PC speakers working at the same time.
I have a plan that I need to check with others to see if it will work.
1. Disable the sound on the video card.
2. get a soundcard with analog sound out and spdif out
3. connect the analog to PC speakers
4. get this DVI + spdif to HDMI adapter - http://www.buy.com/prod/dvi-audio-spdif-toslink-to-hdmi...
5. connect soundcard spdif and video card DVI to this box
6. box hdmi to tv

The only thing in here I am a little unsure of is if a soundcard can output analog and spdif at the same time.
Anyone's thougths?

Thanks
May 12, 2010 11:10:12 AM

Or should I get a NVidia video card that needs spdif sound in and hdmi w/ sound out? (and also still get the sound card that can do analog and spdif at the same time)
That might be the same price and be a little more clean.

Suggestions on model numbers?
I am a minimal price person (cheap) so looking for the minimum models.
Anonymous
a b U Graphics card
a b C Monitor
June 15, 2010 2:40:47 PM

Guys.......... a simple question............. can i use just one PCI card to view movies from PC on a HDTV???????? I will be interested if there is ONE PCI card to take both digital audio and video signal from PC (could be bluray, divX, DVD) and throw both via a HDMI which i could input to a AV receiver and onto a HDTV and surround sound system.............

Any suggestions are welcome.............
July 12, 2010 3:17:32 AM

just wanted to say cheers as this post helped me understand how to get my hdmi cable connected to my computer via a dvi/ hdmi converter. And yes I have an ATI card(xfx HD5970 black edition) but just means if you have an ATI card all u need to do is go to control panel and change ATI HDMI out so you can control the pc volume via TV remote
July 26, 2010 12:44:22 AM

Hello. I read this post from the begining, but I have a huge problem. I bought a Zotac Gforce 9500GT and connected my 40`` Samsung through the DVI-HDMI and the video is nice. Now, the audio is another thing. The problem is that my MOBO does not have a Spdif out Header, so, I cant conect the Spedif cable that came with the Card.
Note, My Mobo is a Foxconn, with 8 channel analog audio, but NO Optic or Coaxial audio output (nor the Spdig header mentiones earlier).

How can I creat a Spdif autput ??? Do I have to bought an Audio card ??? Which one?

Help!!!!

Thanks!!!!

Chris.
July 27, 2010 10:41:01 AM

I have a stock NVIDIA 295, which has both DVI and HDMI output. Unfortunately, the hdmi output is on the second internal SLI card and is not recognized by the bios during post, which means I cant see anything on the monitor until windows boots up (no bios). So, I have to use one of the DVI ports to access the bios. Since I overclock, I access the bios a lot, and therefore the only long term solution is to switch to DVI.

So I got a generic DVI to HDMI adapter (which originally came with an after market ATI X1950), and hooked it up, and amazingly, audio comes strait through the adapter and is picked up by my monitor. It's surprising because it is a totally generic adapter, which is pretty old and probably never designed to carry audio in the first place, and here it is working with an NVIDIA card.

It seems that all the adapter does is carry the HDMI signal in it's entirety and let the end devices sort out what's what. This means that the NVIDIA card is encoding audio into the DVI video stream in the same way that it is encoding audio into the HDMI video stream. This doesn't seem like a proprietary technology at all, and is probably a standard of some sort. Although it's not in the original DVI spec, I can see no reason why it wouldn't be an open standard.

Another possibility is that the 295 is detecting that the device on the DVI port is operating as a HDMI device, and is then changing the signal to suit, in which case, as others have stated above, the DVI port would not actually be operating in DVI.
July 27, 2010 10:44:37 AM

chdgarcia said:
Hello. I read this post from the begining, but I have a huge problem. I bought a Zotac Gforce 9500GT and connected my 40`` Samsung through the DVI-HDMI and the video is nice. Now, the audio is another thing. The problem is that my MOBO does not have a Spdif out Header, so, I cant conect the Spedif cable that came with the Card.
Note, My Mobo is a Foxconn, with 8 channel analog audio, but NO Optic or Coaxial audio output (nor the Spdig header mentiones earlier).

How can I creat a Spdif autput ??? Do I have to bought an Audio card ??? Which one?

Help!!!!

Thanks!!!!

Chris.


Unless your card has a built in sound card (which it doesn't), you really need an spdif output on your mobo. Pick up a cheap soundcard with an spdif output, or, since your already going to the trouble, pick up a nice high quality one like a creative x-fi titanium, or one of the other (possibly better) alternatives. They all have SPDIF as standard.
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