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Update audio.md - 2 channel wordage
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r-htpc authored Jan 18, 2025
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Expand Up @@ -503,9 +503,10 @@ You can read more about Normalization [here](https://www.realhd-audio.com/?p=674
In order to determine what audio codec/channel configuration is supported, the operating system will usually get its information from something called EDID, via the display interface (HDMI/DVI/etc..) and then show what's capable for **PCM/decoded audio**, NOT bistreamed audio (like Dolby) in the sound control panel.

If you're connecting your HTPC directly to a TV first, it will usually detect it as Stereo in the sound device configuration, per either the TV's internal speakers or older HDMI ARC and Optical ports, which only support 2-channel PCM audio. If you want to send PCM 5.1, you either have to:
- Change to a different HW setup to get around the audio interface with this limitation ([as per the setup scenarios above](/wiki/audio#hardware-setup))
- [Encode your PCM 5.1 audio into Dolby bitstreamed audio, use only bitstreamed audio](/wiki/audio#my-sound-system-only-supports-decoding-dolby-digital-but-i-want-to-play-content-with-varying-formats-how-do-i-re-encode-it-all-to-dolby-digital)
- Upgrade your display/[sound system compoents](/wiki/audio#what-kind-of-sound-system-should-i-get) with the [limited interfaces](/wiki/audio#audio-transportsinterfaces).
- Change to a different HW setup to get around the audio interface with this limitation ([as per the setup scenarios above](/wiki/audio#hardware-setup))
- Configure your media applications to use only bistreamed 5.1 codecs supported by your [audio interfaces](/wiki/audio#audio-transportsinterfaces). See the Application-Specific Setup For Bitstreaming section above.
- [Encode your PCM 5.1 audio into Dolby bitstreamed audio](/wiki/audio#my-sound-system-only-supports-decoding-dolby-digital-but-i-want-to-play-content-with-varying-formats-how-do-i-re-encode-it-all-to-dolby-digital)
- Upgrade your display/[sound system compoents](/wiki/audio#what-kind-of-sound-system-should-i-get) that have the [limited interface(s)](/wiki/audio#audio-transportsinterfaces).

If you're confident [your display](https://www.rtings.com/tv/tests/inputs/5-1-surround-audio-passthrough) and sound system interfaces support PCM above 2 channels or support the codecs you want to bitstream, it is possibly solved by exporting the forementioned EDID data coming from the TV and then editing the Audio Block portion of it to add the audio formats supported by your sound system (Way #2/#3).

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