I just tried to loop an USB audio device whose Windows volume control doesn't work through VBCable, to regulate volume globally in Windows through VBCable. Now I discovered that the volume slider for VBCable also does nothing.
Regulating volume for digital devices is not at all unusual. I'm currently sitting on a PC / media center on which I regulate the volume via its HDMI output no problem. Why does it work for some, and for some not, and why not on VBCable? Okay, the name "cable" itself suggests lack of such a function, since a cable doesn't have volume control

Either way, thank you to the developer for creating VBCable and allowing us to use it - very useful tool for a lot of applications. With a functional volume control, it would be even better.
Regards
Stoneeh / Markus