Prorgram changes in increments and relative to some index

Question

MIDI Target Manufacturer(s): Line6

I am setting up a control panel for Guitar unit... it has 126 presets. The presets are arranged into 42 banks of 3 presets each. I want my MIDI Designer panel to be able to change the bank and preset by sending the appropriate program change command. I am trying to set it up as Five Buttons:

Bank Up, Bank Down (Supercontrols on a 1-42 knob I call bank)

Grouped Buttons Preset A,B,C (Subcontrols of a Super Control I PrIndex that goes 0-2)

Whenever Bank Up/Down Trigger I need program change to be Bank*3

Whenever A,B,C trigger I need Program Change: Bank*3+PrIndex

Can this be done in MIDI designer? I have like three or four processors that do this so someone has to have tired it before.

The problem is the A,B,C Buttons. The bank can be done with ticks

I have another device that works similarly but with different # of 'banks' and four (A,B,C,D) positions per bank.

I have got the bank switching working by making a knob that goes from 1-126 and PC. And then assigning the 'bank' knob as a super control for it with the proper range and 42 ticks so that it skips 3 presets up or down when the bank up and down buttons are hit but I cannot figure out how to make the A,B,C buttons work because they are relative to another and bank.

Comments

Could you also put a few sample MIDI messages that you'd like to achieve. It might be easier to think about outputs. Thanks.

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So say the bank was set to 5 it would send MIDI PC 14 (3*bank-1) then button A would send PC 14 (3*bank-1) button B would send PC 15 (3*bank) button C would send PC 16 (3*bank+1).

If bank up is pressed we are on bank 6 so that would send PC 17 (3*bank -1) and any subsequent press of A,B,C would send 17,18,19 until bank changes

So bank up/down changes the current index to 3*index-1 and sends a PC message to the beginning of the bank or maybe even have an option to make it just change the index but not even send that first PC since you really just want to change what PCs the A/B/C buttons send.