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FAQ: HDMI and sound.

Discrete NVidia Graphics Cards

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

Brief instruction
1) Configure the system to output sound via the digital SPDIF interface.
In Windows Vista, it is usually presented as a separate independent audio device. To output all sounds, just 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 sound via SPDIF in only one player by selecting the appropriate device in it. In this case, if you do not touch the "default device" then the remaining sounds will remain on the analog output.
In Windows XP, SPDIF configuration often causes problems. The fact is that in this OS the digital output is not displayed as a separate sound output device. Therefore, where the sound will go depends on the personal preferences of the drivers. As a rule, the analog and digital outputs are either duplicated, or when a digital output is connected, the analog is disabled.
At the end of the article, an example of Media Player Classic setup is given.
2) Connect the "SPDIF-out" and "Gnd" of the motherboard / sound card and the corresponding input of the video card. It is important to correctly connect the pins of the bridge with the output of the sound card. Usually, there are appropriate signs on the bridge. However, if there are no signs, you can figure out how to turn it on using the poke method. Do not be afraid to make a mistake - if the connection is incorrect, the sound from SPDIF out will simply go to the ground of the video card and nothing bad will happen.
However, be careful! Do not confuse the audio connector with the 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" pin on the SPDIF output of the motherboard / sound card. This will most likely cause the SPDIF output of the sound card to burn.
For NVidia graphics cards, sound will go through any DVI-> HDMI, HDMI-> HDMI cable, with or without adapters.

Supported audio formats:
The list is limited by the capabilities of SPDIF. Only PCM Stereo, Dolby Digital 5.1 and DTS 5.1 are supported.

Discrete ATI | AMD Graphics Cards

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

Brief instruction
Be sure to install the driver of the Realtek sound controller integrated into the video card. Latest version 2.25.
After that, the Realtek HDMI Output audio device should appear on Windows. If we need all sounds to be transmitted via HDMI, select it as the default device:
In Vista: Control Panel-> Sound-> Play. Select Realtek HDMI Output.
In XP: Control Panel-> Sound and Audio Devices-> Audio-> Sound Playback-> Default Device.
If you want to output HDMI audio only in your favorite player, you need to select the 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 Media Player Classic setup is given.

Supported audio formats:
All formats are PCM, DTS and Dolby Digital. Support for Dolby True-HD and DTS-HD (sampling rates up to 192KHz, stream up to 6.144 Mb / s) has been added to 48xx cards.

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 ATI Series 2xxx and higher video cards support audio over HDMI as well as discrete graphics cards.
Everything written for discrete graphics cards is also valid for mobile solutions, with the exception, of course, that in the vast majority of cases, the HDMI connector, rather than DVI, is soldered on the laptop, and, accordingly, no adapter is required.
Mobile video cards of NVidia series 8xxx and higher support audio transmission via HDMI in the same way as discrete ATI video cards, i.e. 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 sound.

General notes for all graphics cards

  • It is recommended to connect only on completely 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 to NVidia / installed the driver for ATI, but the sound still does not appear, open the instructions for the TV and check - firstly, whether it is necessary to specifically select 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 you should try them first. You can select a format in Vista on the "Supported Formats" tab in the properties of your audio device. In XP, this, as already mentioned, is a 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, it is a connector located closer to the spdif input (i.e. closer to 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, you need to check at random.

  • FAQ

    Q1: My NVidia graphics card should theoretically support signal reception with SPDIF, but for some reason the manufacturer forgot to unsolder the corresponding connector, but there was left a place for it.
    Q2: On my motherboard / sound card there is no soldered SPDIF output in the form of pins - only an external RCA connector or Jack jack.
    A: If you are friends with a soldering iron, you can easily solder to the board manually. Do not forget that 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 sound at all (although the chipset contained such support), but the sound went after soldering the connector ..

    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 from the computer.
    A: We select the analog output as the default device (as usual, it was). And in the settings of your favorite player through which you watch movies on TV, we select SPDIF (for NV) or Realtek HDMI Output (for ATI), respectively.

    Q: Media Player Classic setup example
    A: ATI
    Go to 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 Options - Internal filters settings, click on the "AC3" filter and select "SPDIF" in the dialog that appears. In this case, the same settings for the "DTS" and "LPCM" filters will be automatically set.