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I'm looking for a way to render a 4-channel audio file where the channels are mapped to stereo, that is, two of the channels play on the right channel and two on the left.

When I make a 4-channel file in OGG or WAV, the two first channels are joined as a stereo track and the other two become mono (image below). But I wanted the other two to also be joined in a stereo track.

In other words, I don't really need a 4-channel file, but rather an audio format that allows to keep separate tracks.

enter image description here

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  • What's your use-case for this? If you want output to two channels why not just save as stereo file?
    – Tetsujin
    May 3, 2022 at 13:45
  • Because I want to keep the tracks separate (let's say I want to isolate one of the tracks later).
    – Raphael
    May 3, 2022 at 14:36
  • What are you playing back from that can handle 4 independently-panned channels? This sounds like some kind of XY Problem
    – Tetsujin
    May 3, 2022 at 17:46
  • this looks more like an issue with audacity - I am fairly sure WAV format doesn't distinguish between 'types' of track, just the overall number of tracks in a poly file.
    – Mark
    May 3, 2022 at 21:59

1 Answer 1

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You can export a multi-tracks audacity project as a multichannel wav file. For this, you need to activate the use advanced mixing options in the Import/Export preference pane. You will then be offered a channel mapping option when exporting audio.

(Notice that such a four channel file would not be played as two stereo track in most players).

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