nanokontrol Korg Studio
As I wrote before, I have nanoKONTROL STUDIO KORG installed in Daw Cubase.
Once launched in Cubase Unify can be assigned to individual INST (1,2,3,4,5,) mixLevel and this allows you to control the volume of individual INSTs.
In Macro 8 I joined master / mixLevl and I can adjust the sum of the volume.
A very convenient feature.