Hi,
Can we put / consider this thread as Feature Request then? 
Volume and brightness are very frequently used features,
not just on-the go, but depending on content, weather and mood.
Would be nice to have a working solution for all monitors. SourceCode is there and licensed for CommercialUse, it seems
Plus / bonus - ability to adjust it via scroll action, not a rotation workaround (feature-requested for Sound Volume).