How to change volume balance for headphones? I am using a Moto Z2 Play, unrooted. One ear is louder than the other and i have discovered thaf it isnt the earbuds. How can I change the volume balance on my earbuds?
You may have a 4 pin jack ( Left Speaker Positive, Right Speaker Positive, Ground, Microphone Positive ) 

If your headphones are three pin, you may have a misaligned connection with one of the speakers... 

Here's an example of what i mean by 4 pin .



You can see the problem with the 3 Pin headphones fitting here...

So you can either buy an adapter, make an adapter etc...   

If you are sure your PINs are aligning properly, you can rule this out and then continue..

In my experience developing music players for background applications, you can not set the volume without using a value for both the left speak and right speaker, For this reason, most developers use a single float value and apply it as both volumes... The developer would need to make a music player that allows independent volume setting, or a set volume difference on a per-app basis.