This page has been robot translated, sorry for typos if any. Original content here.

FAQ: HDMI and sound.

Discrete NVidia Graphics Cards

What you need to output sound through NVidia video cards
1) A discrete video card of the 8xxx series or higher with a soldered double-pin connector for sounding. Whether there is such a connector on your video card can be found in the specifications.
Other indirect signs:
- availability of SPDIF-jumpers included
- in the case of ASUS video cards - in the model designation should be the index "HTDI", and not "HTDP".
- the connector should be visible in the photo
Sound support is embedded in the chipset, but video cards may follow the reference, or they may not follow, and there is a nuance - specs for specific video cards may not 100% correspond to reality.
2) Sound card (integrated or discrete internal) with pin pin on the SPDIF board.
3) A simple bridge connecting these two devices. Usually it comes with vidyuhi, but if not, then you can easily do it yourself. On sale has not yet been noticed.

Brief instruction
1) Configure the system to output audio via the SPDIF digital interface.
In Windows Vista, it is usually presented as a separate independent audio device. To output all sounds, it is enough to make it the default output device. The control panel-> sound-> playback, is called something like this: "Digital output device (SPDIF)". You can configure the system to output audio over SPDIF in only one player by selecting the appropriate device in it. Moreover, if you do not touch the "default device", then the remaining sounds will remain at the analog output.
In Windows XP, SPDIF settings often cause problems. The fact is that in this OS the digital output is not displayed as a separate audio output device. Therefore, where the sound goes depends on the personal preferences of the driver. As a rule, the analog and digital outputs are either duplicated, or when a digital output is connected, the analog output is turned off.
At the end of the article, an example of setting up Media Player Classic is given.
2) Connect the "SPDIF-out" and "Gnd" motherboard / sound card and the corresponding video card input. It is important to correctly connect the pins of the bridge to the output of the sound card. Usually, on the bridge there is a corresponding designation. However, if there are no designations, you can find out how to turn it on using the scientific method. Do not be afraid to make a mistake - if you connect incorrectly, the sound from SPDIF out just goes to the ground of the video card and nothing terrible will happen.
However, be careful! Do not confuse the connector for sound with a connector for connecting a video card cooler. This is especially true on video cards with passive cooling, where the connector for the cooler remains free. Also, do not connect the bridge to the "power" contact on the SPDIF output of the motherboard / sound card. This is likely to cause the sound card SPDIF to burn out.
For NVidia video cards, the sound will go over any DVI-> HDMI cable, HDMI-> HDMI, with or without adapters.

Sound formats supported:
The list is limited by SPDIF features. Only PCM Stereo, Dolby Digital 5.1 and DTS 5.1 are supported.


Discrete ATI | AMD Graphics Cards

What you need to output audio through video cards ATI | AMD
a) Video card of 2xxx series and above.
ATI graphics cards already have their own sound controller built in, so no other audio devices are required.
b) In the case of audio output through the DVI connector, you must use a proprietary DVI-> HDMI adapter.
Check the availability of the adapter in the kit directly in the store where you make a purchase - the equipment may vary!
You must use the adapter that comes with your video card.
Adapter for example from 3650 can not earn from 3450.
Left adapters, as well as DVI-> HDMI cables will not work.
The "correct" adapter contains a chip with a number embedded in it. (requires clarification) Some video card manufacturers are “plugging” the adapter into “checking the correctness”, and the sound will go even with a DVI-HDMI cable.
Adapter can be made independently (env in a new window).

Brief instruction
Be sure to install the driver integrated into the video card sound controller Realtek. The latest version is 2.25.
After that, the sound device Realtek HDMI Output should appear in Windows. If we need all sounds to be transmitted via HDMI - select it as the device by default:
In Vista: Control Panel-> Sound-> Playback. Choose Realtek HDMI Output.
In XP: Control Panel-> Sound and Audio Devices-> Audio-> Sound Playback-> Default Device.
If you want to output audio via HDMI only in your favorite player, then you need to select a Realtek HDMI device only in it, and leave the usual sound card as the default device. At the end of the FAQ, an example of setting up Media Player Classic is given.

Sound formats supported:
All PCM, DTS and Dolby Digital formats. Dolby True-HD and DTS-HD support has been added to the 48xx series cards (sampling rate up to 192KHz, stream up to 6.144 MB / s).


Mobile video adapters, integrated solutions, etc.

The article is currently being formed.
The integrated Intel GMA 4500 and Nvidia GeForce 8300 GPUs support 7.1-channel LPCM audio output.
Mobile video cards ATI 2xxx series and above support the transmission of sound via HDMI as well as discrete video cards.
Everything written for discrete video cards is also true for mobile solutions, with the exception, of course, of the fact that in most cases the HDMI connector is unplugged on the laptop, and not DVI, and, accordingly, no adapter is required.
NVidia mobile video cards of the 8xxx series and above support the transmission of sound via HDMI by the same principle as discrete ATI video cards, i.e. They have their own sound controller, which is defined by the system as a separate audio output device (Realtek HDMI Output).
As for the supported formats, it is reliably known about the output of 5.1-channel audio.


General notes regarding all video cards

  • It is recommended to make connections only on fully de-energized TV and PC (be sure to pull out the cable - antenna) - there is information that HDMI is on
  • If you are sure that you have correctly configured the system, connected the bridge in NVidia / installed the driver for ATI, but the sound still does not appear, open the instructions for the TV and check - firstly, do you need to specifically select the HDMI audio reception in the TV menu, and which digital audio formats are supported. As a rule, PCM Stereo 44.1 and 48 kHz signals should be supported, so first of all you should try them. You can select the format in Vista in the "supported formats" tab in the properties of your sound device. In XP with this, as already mentioned, the problem.
  • There is information that on some video cards, both ATI and NV, only one of the connectors can output sound. On NV, for example, this is a connector located closer to the spdif input (thus closer to the SLI). Sometimes it is marked with the corresponding color (for example, the yellow adapter needs to be inserted into the yellow connector). If there are no such instructions, it is necessary to check at random.


  • FAQ

    Q1: My NVidia video card should theoretically support signal reception from SPDIF, but the manufacturer for some reason forgot to unsolder the corresponding connector, however, the space for it was left.
    Q2: There is no soldered SPDIF pin-shaped output on my motherboard / sound card - only an external RCA connector or jack for connecting Jack.
    A: If you are friends with a soldering iron, you can easily solder to the board manually. Do not forget that to work you need to solder only one wire - it is not necessary to connect the earth.
    There is a known case when officially (according to ASUS itself) the board did not support the sound at all (although the chipset contained such support), but the sound went after the connector was soldered ..

    Q: I want the sound on the TV to go only when watching movies. In other cases, the sound should go to the usual speakers at the computer.
    A: We select the analog output as the default device (as usual). And in the settings of your favorite player, through which you watch movies on TV, choose, respectively, SPDIF (for NV) or Realtek HDMI Output (for ATI).

    Q: Example of setting Media Player Classic
    A: ATI
    Go to the settings view-> options-> output-> direct show audio. In the list, select the device we need Realtek HDMI Output
    A: NVidia:
    a) If SPDIF out is defined as a separate device:
    Similar to ATI: view-> options-> output-> direct show audio. In the list, select the desired SPDIF device.
    b) If there is no separate SPDIF device:
    Go to the settings Options - Internal filters, click on the filter "AC3" And in the dialog box that appears, select "SPDIF". Now the same settings for the "DTS" and "LPCM" filters will be automatically set.