Hi,
By "registering start + right/left inputs", do you mean that the combination can be detected in game, but does not change the volume? In that case, make sure you have "Enable loading external FIRMs and modules" turned on in Luma3ds's settings. (You can access the setting menu by holding...
TL;DR: download the zip file from here (search rehid_w_virtual_sliders on github) and unzip it to your sd card root. Make sure you have FIRM patching in Luma3ds settings. Use START+L/R to adjust volume, SELECT+L/R to adjust 3D. Does not work under DS (+ GBA?) mode.
You don't need rehidhelper...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.