Does Musescore have a comprehensive API (Application Program Interface) which can be accessed by other software? By comprehensive I mean more than just the shortcuts?
At the moment it is possible to get some hardware and software to interface with MS using shortcuts, but some functionality is not accessible. For example, with a more comprehensive API it might be possible to control the different mixer channels with a hardware or software slider interface or knobs - like a "real" mixing desk.
It is possible to activate the MS Mixer from an external control - but then the actual mixer sliders themselves have to be controlled from the normal mouse input.