I have USB speakers connected to my Ubuntu desktop. Because of the way the cables are attached & my floor layout, I would like to reverse the left and right speaker output. Is there a way to do this?


Edit /etc/pulse/default.pa and the following lines ...

load-module module-remap-sink sink_name=reverse-stereo master=0 channels=2 master_channel_map=front-right,front-left channel_map=front-left,front-right
set-default-sink reverse-stereo

... Then restart the pulseaudio daemon with:

$ pulseaudio -k
$ pulseaudio --start

You can also omit "set-default-sink" line above and select the reversed output in the sound settings dialog when you need it.


  • Master may not always be 0 so if this doesn't work (as was the case for me) check the output of pacmd list-sinks and substitute the appropriate index. – midiarsi Aug 9 '19 at 19:32

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