build-in functions for Kodi settings

Hi folks,

I’d like to control Kodi settings from keymaps. For example map a button for switching stereo upmix (because I want upmix just for music and not for PVR or vice versa – maybe this one can be automated by addon).

But I can’t find more detailed documentation than this built-in functions list. Is it possible to expose settings/system settings values thru the functions API?