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What Is Downmixing? Part 1: Stereo (LoRo) | TV Tech

https://www.tvtechnology.com/opinions/what-is-downmixing-part-1-stereo-loro

Part 1: Stereo (LoRo) Part of the ATSC audio system, also known as Dolby Digital (AC-3), is the ability to send programming with any number of discrete audio channels up to 5.1 to any viewer- regardless of how many speakers they might have. Reproducing 5.1 channels of audio through a lesser number of speakers requires a process called downmixing.

[Request] Add a matrixed stereo decoder (e.g. Pro Logic II ...

https://github.com/Nevcairiel/LAVFilters/issues/471

LAV Audio Decoder can downmix a multi-channel source to 2.0 stereo and encode it with Dolby Pro Logic II matrixed surround sound that can be decoded by an A/V receiver. However, it can't do the opposite -- decode a matrixed stereo source into 5.1 surround.

Stereo Downmix Problem · Issue #1061 · …

https://github.com/HandBrake/HandBrake/issues/1061

Choose stereo downmix in audio tab with both handbrake versions and compare the two tracks between them. Then, compare those same tracks with the original 5.1 track downmixed in stereo on the fly/on playback (e.g with MPC-HC + LAV Audio Decoder.) HandBrake version. 1.0.7. Operating system and version. Windows 7 32-Bit

Need advice about mixing 5.1 down to stereo - VideoHelp Forum

https://forum.videohelp.com/threads/367078-Need-advice-about-mixing-5-1-down-to-stereo

I had a look at the way of couple of decoders downmix. By default, LAV Audio decreases the centre channel volume by 3dB, the surround channels are reduced by 3dB and it doesn't include the LFE channel at all. ffdshow mixes the centre channel at -3dB, the rear channels without reducing their volume, and it includes the LFE channel at -3dB.

Correct output when 7.1 audio is downmixed to 5.1 speaker ...

https://www.avsforum.com/threads/correct-output-when-7-1-audio-is-downmixed-to-5-1-speaker-setup.1688745/

LAV Filters downmix always seems to use both Surround speakers (left and right) when playing back any of the Side/Back speaker channels from the 7.1 source. ... For example, if I configure this to "Stereo", then my default audio output via HDMI from my HTPC to the receiver is only 2 channel as confirmed by my receiver.

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