Ultimate guide to patch one earphone quieter than the other

Using /e/OS Setup
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1

Ok guys !

I have taken the decision to create this post in order to have an ultimate guide to patch the too famous issue of “Earphone quieter than the other”. I had this issue on my old iPhone 5s and now on my S7 under /e/OS. I thought that was a sound card issue and that changing phone would just fixe that but NO.
Yesterday, my earbuds were working like a charm, today they don’t. The sound volume seems to be mega-low in the right ear. Strangely, it is always the right that cause issue.
I have thrown away 5 earphones like that, wired or not. I definitly want to get rid of that trouble that traumatized too many people.
If you know some way to patch it, please send it here. Applications, command-lines… Anything.

Thanks for your support and your participation, together we can make this thing fixed.

2

In my case, looks like it doesn’t directly come from the phone. Actually, the “Power on” sound in the earphone is impacted, and the problem occures on every platform, mobile or computer…
I think that the phone modifies something in the earphone hardware. It’s not a wire or something like this as it’s my 5th earphone…
If you guys have something similar or a way to fix it, please let me know !