Hey guys!
Julien and I have been reading the keebwerk. comments, a lot of confusion is occurring here.
So the manual sits at:
https://www.keebwerk.com/support/The nano. works like any other QMK keyboard, just with a added MIDI functionality. The MIDI slider communicates with the PCB in a language that can be read by literaly any program that is MIDI supportive,you can use Photoshop apps, Foobars MIDI plugins, Windows Vol. and more! All you have to do is then just google "MIDI for Windows volume" and find the necessary app. MIDI is extremely powerful and can be used for anything.
Julien will update the manual part to provide different uses for the nano. slider, so for windows volume and foobar, lightroom, and more. There will be a comment section opened too!