Quite often, at least daily the right and left channel for my analog output are not balanced. I have to set it to 0 to rebalance them perfectly, then increase volume to desired range.
I am using
amixer -D pulse sset Master 5%+ to increase volume and
amixer -D pulse sset Master 5%- to decrease the volume as keyboard shortcuts for the "volume up/down" hotkeys on keyboard.
Any idea why the balance is always off after I reset it, from just using those 2 commands?