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only 2 channel audio through HDMI | NVIDIA GeForce …
https://www.nvidia.com/en-us/geforce/forums/gaming-pcs/8/90783/only-2-channel-audio-through-hdmi/
only 2 channel audio through HDMI4Jan 2010Jan 2016. i just purchased a ZOTAC ION A-B mobo. IONITX-A-B/C/E/U using Windows 7 64bit. the audio properties of Windows 7 only shows 2 channel audio over HDMI. from the HDMI port of the mobo i am connected to a Sony 46w5500 TV then using the optical passthrough from the TV to optical IN on my amp.
NVIDIA HDMI - Limited to 2-channel audio
https://social.technet.microsoft.com/Forums/en-US/41a4cb69-08ab-4099-8efc-05245b76a6ce/nvidia-hdmi-limited-to-2channel-audio
In my audio properties, the HDMI connection shows the max number of channels is 2, and doesn't offer any kind of options. I would like it to output dolby 5.1, but the option isn't there. I installed the latest chipset drivers from NVIDIA, as well as the HDMI audio driver, but it didn't help - also says HDCP is not supported.
HDMI Audio on NVIDIA GPUs
https://download.nvidia.com/XFree86/gpu-hdmi-audio-document/index.html
For example, if the hardware and/or display device support only 2-channel 48KHz stereo audio, then that is all that will be available via this ALSA device. ... CARD=NVidia,DEV=2 HDA NVidia, NVIDIA HDMI HDMI Audio Output hdmi:CARD=NVidia,DEV=3 HDA NVidia, NVIDIA HDMI HDMI Audio Output. Again observe that aplay -L's output uses the slightly more ...
Solved - Digital Audio (HDMI) only has 2 channel option ...
https://www.eightforums.com/threads/digital-audio-hdmi-only-has-2-channel-option.6655/
all digital outputs cannot be configured in windows - this is why you can only see 2 channels. this setting applies only for analog audio as it is processed by windows. As it is digital signal streamed to external decoder - windows setting doesn't mean anything, correct format is encoded by source app and decoded by ext. device.
To set up digital audio on your graphics card - Nvidia
https://www.nvidia.com/content/Control-Panel-Help/vLatest/en-us/mergedProjects/nvdsp/To_set_up_digital_audio_on_your_graphics_card.htm
To set up digital audio on your graphics card. From the NVIDIA Control Panel navigation tree pane, under Display, click Set up digital audio to open the associated page. The Set Up Digital Audio page lists the NVIDIA GPUs in the system that have audio-capable display connections, and then lists those connections (HDMI, DisplayPort, or DVI). For each connection, this page lists …
HDMI Output only detects 2 channels not 5.1 - Dell
https://www.dell.com/community/Laptops-General-Read-Only/HDMI-Output-only-detects-2-channels-not-5-1/td-p/5150629
I meant that the Realtek codec probably is only a 2 channel codec, however that doesn't have anything to do with the HDMI audio. HDMI audio is a raw digital signal, which does not pass through the Realtek's DAC. It goes straight to an external DAC, usually one built into a TV. In your case, you are using the DAC of your digital receiver.
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