Grouped VCA Faders-style Volume Slider

Grouped VCA faders allow controlling multiple faders (audio sliders) simultaneously while maintaining the relative value of each slider. This is a pattern commonly seen on physical audio mixing desks. The master slider can be used to reduce the volume of all channels at once, so that you don't need to individual scale down each channel's volume just to increase one channel's volume. The main place I can see such a system being applied is in video game settings interfaces.