Is there an easy way of forcing mono sound output - for one ear, one earphone, one speaker?
I had problems with both of these answers. When I tried the accepted answer, the only thing that would come out of the speaker was noise. After some searching, I found another solution that might work better for you:
Replace alsa_output.pci-0000_00_1b.0.analog-stereo with the sink name you get from
Follow the steps in the accepted answer if you would like to make this solution permanent.
~VIA~ Translated from French (and considering the correction signaled at the end of the forum page)
You can use the module to remap pulseaudio:
In a terminal:
It will send you the name of the stereo output used. Then you type (replacing with the name you have found):
(In my case that was:
If you open the Sound Preferences you should now have a mono output available. To have that permanently:
then you add in the file:
(The image is from the sound settings of Elementary OS Luna).
Installing Gnome Alsa Mixer, there are some options:
"Mono Output Select" and "Mix Mono"