Button Group - Non linear progression

Question

MIDI Target Manufacturer(s): TC-Helicon

I created a knob (supercontrol) with four buttons (B1 to B4) set as subcontrols, when scanning the scale from the knob the results are non linear and a little confusing, the results are as follows:

In all cases MIDI is set to NRPN (0-16k) 0 to 16383, and interval is the number of ticks the button remains on.

Knob Scale 128ticks (0 to 127)

    B1 = 0     to 21    Interval 22
    B2 = 22   to 63    Interval 42
    B3 = 64   to 105    Interval 42
    B4 = 106 to 127    Interval 22

Knob Scale 256ticks (0 to 255)

    B1 = 0      to 42    Interval 43
    B2 = 43  to 127    Interval 85
    B3 = 128 to 212    Interval 85
    B4 = 213 to 255    Interval 43

Knob Scale 512ticks (0 to 511)

    B1 = 0      to 85    Interval 86
    B2 = 86  to 255    Interval 170
    B3 = 256 to 425    Interval 170
    B4 = 426 to 511    Interval 86

Not sure if this is as intended?

Thanks

Lenny

Comments

Button subs depend on the midi value of the suoercontrol tick as a percentage of possible midi max. That sentence is dense but says it all ;)

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Mmmmm! sadly I have a very simple brain that would probably want each button to have a fair slice of the cake, 2 buttons 50% each of 'MIDI Absolute Max' (16,384), 4 buttons 25% each of 'MIDI Absolute Max', this would then make the results far more predictable. Is it possible to provide an example of how to set up a supercontrol (Knob) range 1 to 512 with a four button group where each button is on for 25% of the range eg B1 1-128, B2 129-256, B3 257-384, B4 385-512.

Thanks

Lenny

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That is how it's supposed to work, so if there are two subs it's 0% and 100% (16383) and if it's four subs it's 0% 33% 66% 100%... the thing that's not ideal is that you have to calc the percentages elsewhere (or just guess)... in the future the UI should include percentage, but not sure when we'll implement that.

Thanks!
Dan

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I had worked that out by pressing the buttons which on a 1-512 scale give me 1,171,342,512 which is near enough to what you have said, however what I want to do is go from the master (Knob) not the buttons, on rotation of the master the buttons will come on as follows: 1,87,257,427 maths was never my strong point so hard for me to see a relationship between the two, as I have already worked around the issue then it is not really important, I just like to understand what's going on :-)

Thanks

Lenny

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Best way to work it out is to use Google Sheets (or Excel, etc.) to try to figure it out. I'll see if I can set up a sheet at some point to show how this works.

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Maths isn't my strong suit either, which is why I have to try it all out. NOTE: If your numbers are close, that also works. Exact numbers don't help get the buttons on more precisely or anything. So ballpark numbers do work.

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Having consulted with 'The Hitchhiker's Guide' (as Einstein is dead) the answer appears to be '42' so no more thought needed :-)

Lenny