Lena Torres
HDMI audio through a GPU has been a topic of discussion on various hardware forums, with users seeking to understand if their graphics card's HDMI port supports audio output. While some users have reported challenges in getting sound through their GPU's HDMI port, others have confirmed that it is possible with the appropriate settings, drivers, and hardware. It appears that modern NVIDIA cards have an onboard HD Audio-compliant sound adapter built-in, while AMD cards may require specific drivers and settings to enable HDMI audio output.
| Characteristics | Values |
|---|---|
| Audio Output | HDMI carries digital audio |
| Sound Card | Not required if HDMI output is used |
| GPU Audio | Independent of sound card |
| Software Support | Separate sound device on Windows with discrete video card |
| Drivers | Required for AMD and Nvidia cards |
| Default Output | May need to change default output device |
| Latency | No latency issues reported |
| Compatibility | HDMI-compliant devices support baseline stereo PCM |
| Audio Formats | Dolby TruHD, DTS-HD Master, Dolby Digital supported by some cards |
| Windows Sound Settings | Graphics card audio should be listed under Manage Sound Devices |
| Connection | Direct HDMI connection to GPU without adapters recommended |
| Adrenalin 2019 Edition | Supports RX 570 graphics and Ryzen 3 APU graphics |
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What You'll Learn
HDMI audio through a GPU
For example, Nvidia GPUs have a basic built-in sound device, while AMD GPUs feature a full DSP (digital signal processor) for audio processing. However, it's worth noting that games rarely utilise this feature. To ensure HDMI audio functionality, the appropriate drivers must be installed, and the correct output device must be selected.
On Windows, for instance, HDMI audio may appear as a separate sound device, and users can select this as their default output. In the Windows Sound settings, users can verify and select HDMI displays for audio output. Additionally, for Nvidia GPUs, users can access the Nvidia Control Panel and enable digital audio output through the 'Set up digital audio' option.
It's important to ensure that the HDMI output is connected directly to the GPU and not the motherboard, as this can impact audio functionality. Furthermore, certain setups may require an external sound card or amplifier to process audio, particularly if the HDMI connection is primarily used for video signals.
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HDMI audio on Windows
HDMI audio not working on Windows 10/11 is a common issue. This can be caused by several factors, such as loose connections, incorrect audio settings, outdated or missing drivers, or issues with the Windows Audio service.
Firstly, check your hardware connections and ensure that the HDMI cable is securely connected to both your computer and your monitor/TV. If your HDMI cable is connected to a monitor without speakers, Windows will not allow you to choose any HDMI audio output. In this case, you may need to use an HDMI splitter or audio extractor.
If your hardware connections are secure, you can try setting HDMI as your default audio device. On Windows, press the Windows Key + R on your keyboard to open the run dialogue box. Type in "mmsys.cpl" and then click "OK". In the window that appears, click on the "Playback" tab and then plug in the HDMI cable. It should appear in the list of devices, usually under the name of the TV or monitor you are using. If it doesn't appear, right-click anywhere on the list and check "Show disabled devices" and "Show disconnected devices". Once you see the HDMI audio device listed, right-click on it and select "Enable", then click on it again and select "Set as Default".
If you are still experiencing issues, try updating your drivers. Outdated, malfunctioning, or missing graphics drivers can cause HDMI audio problems. You can also try restarting your computer and your monitor/TV to resolve any software issues.
For Nvidia cards, you can enter the Nvidia control panel to set up digital audio. On Windows, go to Control Panel > Appearance and Personalization > Nvidia Control Panel. Under "Display", there is a setting for "Set up digital audio".
Additionally, if you are using a dedicated sound card with an HDMI output on your GPU, ensure that your sound card settings are configured correctly.
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AMD graphics card audio
HDMI devices that support audio are required to support the baseline format: stereo (uncompressed) PCM. Many video cards, including some AMD graphics cards, support audio over HDMI. For example, VisionTek's newer Radeon R9 series even supports the latest audio formats such as Dolby TruHD and DTS-HD Master that are found on Blu-ray disks.
AMD TrueAudio is an application-specific integrated circuit (ASIC) intended to serve as a dedicated co-processor for the calculations of computationally expensive advanced audio signal processing, such as convolution reverberation effects and 3D audio effects. It was introduced in 2013 and is integrated into some AMD GPUs and APUs. A die can house multiple AMD TrueAudio DSP cores, each having 32 KiB instruction and data caches and 8 KiB of scratchpad memory for local operation. AMD TrueAudio SIP blocks are found on the dies of some GPUs of the AMD Radeon Rx 200 Series, including the Radeon R7 260, Radeon R7 260X, Radeon R9 285, Radeon R9 290, Radeon R9 290X, and the Radeon R9 295.
In 2016, AMD introduced TrueAudio Next with the Radeon RX 400 series GPUs. TrueAudio Next utilizes the GPU to simulate audio physics and can reserve GCN compute units for lower latency. It is supported on RX 5000, 6000, and 7000 series GPUs.
AMD Software also offers various audio and video settings to enhance your experience, including Default, Cinema Classic, Enhanced, Home Video, Outdoor, Sports, Vivid, and Custom. Each video profile uses different graphics settings to achieve certain effects in videos.
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HDMI output to sound bar
HDMI output to a soundbar is a great way to get the best audio experience. HDMI Audio Return Channel (ARC) allows certain TVs and soundbars to transfer audio back and forth using a single HDMI cable. This means you can use the HDMI port for both input and audio output.
To set up HDMI ARC, first, power on your TV and soundbar. Then, connect one end of an HDMI cable into the HDMI IN (ARC) port on your TV and the other end into the HDMI OUT (TV-ARC) port on your soundbar. Change the source on your soundbar to the D.IN setting. After a few seconds, "TV ARC" will appear on the soundbar's display, and your TV will transmit audio through the soundbar.
It is important to note that using HDMI ARC will occupy a port on your TV that is usually meant for connecting external devices. As an alternative, you can connect a device directly to your soundbar and then connect the soundbar to your TV. This method will provide you with the best possible sound from external devices. To do this, connect one end of an HDMI cable to an HDMI port on your TV and the other end to the HDMI OUT port on your soundbar. Then, connect a second HDMI cable to the HDMI OUT port on your external device and the other end to the HDMI IN port on your soundbar.
Additionally, you can connect your soundbar to your TV using an optical cable (Tos-Link), which is similar to an HDMI cable and transmits digital sound. This option allows you to connect your external devices directly to your TV while outputting the sound to your soundbar. To set this up, connect one end of an optical cable to the OPTICAL OUT port on your TV and the other end to the DIGITAL AUDIO IN (OPTICAL) port on your soundbar. Finally, set the speaker output on your TV to external speakers.
When it comes to graphics cards, modern NVIDIA cards have an onboard HD Audio-compliant sound adapter built-in. This allows for audio output via HDMI, which will show up as a separate sound device on Windows. For AMD cards, audio output via HDMI is also possible with the appropriate settings and drivers.
By utilizing these methods, you can effectively connect your devices and enjoy an enhanced audio experience through your soundbar.
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HDMI audio on Linux
To get audio through HDMI on Linux, you will need to ensure that your hardware and software are set up correctly.
First, check that your hardware supports HDMI audio. Most modern GPUs meet the minimum specifications for HDMI compliance, which includes support for stereo (uncompressed) PCM audio. If you have an NVIDIA card, you can check for an onboard HD Audio-compliant sound adapter in the NVIDIA control panel. For AMD cards, ensure you have the appropriate settings and drivers installed; it should appear under lshw as an audio device.
Once you've confirmed your hardware supports HDMI audio, you'll need to configure your software. On Linux Mint, for example, you can go to the Sound app and look for HDMI under the Devices on the Output tab. If you don't see HDMI listed, try checking the Configuration tab and changing the Profile from Analog Stereo Duplex to one of the HDMI options.
If you're using Ubuntu, you may need to run alsamixer and ensure that all sound devices are unmuted. You may also need to set a default 'sink' for sound output. There are also bash scripts available on GitHub that can automatically switch to HDMI audio when a cable is plugged in.
It's worth noting that some users have reported issues with HDMI audio on Linux. In some cases, these issues can be resolved by reverting to an older kernel version or using an LTS Kernel.
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Frequently asked questions
Yes, HDMI supports audio. However, this may require special drivers, and you might have to change your default output device.
Examples of graphics cards that support audio over HDMI include Nvidia cards of the 400 series and higher, and VisionTek's newer Radeon R9 series.
If you are using Windows 1903, go into Sound Settings and check if your graphics card audio is listed under Manage Sound Devices. If not, check if your TV is connected to the HDMI output of the graphics card and not the motherboard.
When using a sound card, the audio and video information is sent separately, and the sound card will do the conversion. With HDMI, the audio and video information are sent together, and the conversion is done by the receiving device, such as a TV or sound receiver.
Yes, you can route virtual surround sound through your HDMI by using the What-U-Hear device under the recording tab in your sound devices.
