You're absolutely right, having the OSD (On-Screen Display) simply show the knob name can be limiting when assigning multiple items to it. Custom OSD names would definitely improve usability.
Here's a possible approach:
Custom Text Entry: Allow users to enter a custom name for the OSD that appears when the knob is adjusted. This name would override the default knob name and provide clear identification of the assigned items (e.g., "Volume (Chrome & VLC)").
Presets or Templates: Provide a set of pre-defined names or templates that users can choose from. These could include generic options like "Multiple Items" or "Custom 1win apk" along with more specific options relevant to the software (e.g., "Audio Mixer").
Combined Approach: A combination of custom text entry and presets could offer the most flexibility. Users could choose from presets for common scenarios or enter their own text for more specific configurations.
Implementing any of these options would require changes to the underlying software that controls the OSD. But the benefits in terms of clarity and user experience would be significant.