Yes, i have tried manually changing the sound level in sound mixer, but it seems every time i change it. input mapper makes the sound super loud again. What can i do? Using official ps4 controller connected via usb.
Inputmapper doesn't have any control over your sound software unless you've created macros for the media controls. If Inputmapper is making your notification noise go off and you don't want to hear it you can go to the settings and disable them (settings -> notifications -> uncheck all 3 boxes)
Aside from this, if something is changing your volume the culprit is likely elsewhere.