lets say I have very long audio file, and I want to remove only right channel from BOTH (stereo) channels. Can that be done without re-encoding, just simply switching off one channel? (maybe FFMPEG??)

  • 2
    Not possible with ffmpeg.
    – Gyan
    Feb 25, 2018 at 14:24
  • 2
    Are they stereo files? What do you mean "BOTH" channels? By definition anything that is right channel will not be in the left already. Feb 25, 2018 at 17:39
  • @Timinycricket yes, stereo. I hear voice only in left speaker/headphone.
    – T.Todua
    Feb 26, 2018 at 7:18
  • 1
    what is the encodng of the source files ?
    – audionuma
    Feb 26, 2018 at 13:08
  • @audionuma does it matter? maybe aac (or ac3), possible also mp3.
    – T.Todua
    Feb 26, 2018 at 15:15

1 Answer 1


I don't believe this could be done without batch conversion. What you could do is load all the files into a batch converter and have them run through an effect or process that would produce the desired result, either by panning everything hard left in such a way that the right channel's content was eliminated or by panning the left channel's content to the centre and reducing the volume of the right channel to -inf. There are plug-ins that will do either.

Depending on the batch converter you use, you could replace the individual files or create copies with the channel conversion process applied.

Of course, depending on what you want these files for, you could also set the balance of a media player all the way left when you play the files or have your DAW/editor do it when you load the files into it.

I hope this helps.

  • let's forget batch conversion. For single file I stil ahve to use like AudaCity or CuBase?
    – T.Todua
    Feb 26, 2018 at 7:18
  • 1
    I'm not familiar with Audacity, but I'm sure that the programs you mention will allow the use of the processes I referred to in my answer so you could perform the channel conversions one file at a time as needed, either replacing the content in the right channel by duplicating that on the left or by panning everything all the way left with a stereo balance pan mode depending on the exact result you're looking to achieve. Feb 27, 2018 at 9:02

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