[color=#000080]Veromix, an alternative to KMIX quite interesting because it will explain how to increase the volume of sound in KDE beyond 100%, which still can not be done with KMIX (but soon)
To do this visit:[/color]
Veromix is not actively developed anymore though so we had to patch together our own version for 13.12
I did not understand your reference, (sorry I’m just a newbie to GNU / Linux) but all I can say for it is that my machines improved the value of the volume, if you listen now stronger.