Turn Off Button When Any Are Turned On

Question

This is a question from a user over support. I thought I'd post it here to see if anyone had any solutions.

The Great, Solo, and Orch buttons are used to trigger remapping of the Upper Manual (CH1) of a two manual organ to either Solo ( CH4 ), or Orchestral ( CH 5 ).

The remapping occurs downstream in a Midi Solutions Event Processor Plus.

The buttons P01 to P04 trigger a Performance Number in the Fantom XR.

Each Performance in the Fantom XR contains sounds for Pedals ( CH3 ), Accompaniment ( CH2 ), Great ( CH1 ), Solo ( CH4 ), and Orchestral ( CH5 ).

In the final version we will have Performances P01 to P64.

What I need is:

If Solo or Orch have been selected, and then a Performance button P01 to P04 is pressed, the Orch or Solo buttons are turned OFF, and the Great button is turned ON.

In other words, each time a Performance button is pressed, the organ upper manual defaults to Great.

The Solo and Orch button LED's turn off, and the Great LED turns ON.

I hope this makes sense

I'm sure there is a simple solution, but I'm afraid I can't see one !.

I can't see one either, but perhaps you can. Thanks.

Layout is Here: http://mididesigner.com/qa/?qa=blob&qa_blobid=17482822633951595395