to understand. better what I'm looking for i'll try to explain exactly what I intend to do:
(I think it easier to explain in a video so I made a 2 minute video explaining this also:
I have midi 4 channels for now, and it would be more in the future. For now I have: PIANO, SYNTH, E.PIANO, STRINGS/PADS
On each channels have an Instrument rack that contains different types of that instrument (e.g. On the Piano ch. I have, Grand Piano, Bass&Piano Split, etc).
I'm using this section of the controller to turn on/off devices so I save resources. Those for faders controls my volume for my 4midi and the top knobs controls the same parameters for every ch. - I have Reverb. AutoFilter and on each one of these midi Ch. and with those knobs I can reach fast the parameter I'm interested.
Anyway... what I'm looking for ...for now, is a way to turn off/on different devices/instruments but in a way that is efficient and doesn't cost me the whole board at some point. I wast thinking that the moment I press the first button, another four activates so I can choose what I want. To be more specific: Lets say that I activate the Piano rack, and now I have to chose what type of piano I want. would be nice if the four bottom pads would alow me to do that. But the same 4 pads on the bottom I want to use when I select my type of strings for eg. So I was thinking that some sort of shift button would allow me to do that.