Logic X black keys

// Logic X script to adjust the velocity sensitivity of black keys
// while preserving pianissimo and fortissimo velocities.

// damping factor > 1: decrease black keys' sensitivity - softer black keys
// damping factor = 1.5 : quite good setting to get equal dynamics of black and white keys on a doepfer lmk2+ keyboard
// damping factor = 1: no change
// damping factor < 1: increase black keys' sensitivity - brighter black keys

// [email protected]


var PluginParameters = [{name:"Damping factor", type:"lin", minValue:0.1, maxValue:5, numberOfSteps:126, defaultValue:1.5}];

function curve(x)
{
    damp = GetParameter("Damping factor");
    // so whats a function that maps 0 to 0 and 127 to 127, but takes a dip in between?
    // I know, x^d/(127^(d-1)) for d>0!
    return Math.pow(x,damp)/Math.pow(127,damp-1);
}

function HandleMIDI(event)
{
    if (event.toString().indexOf("#") != -1) {  // hack.
        event.velocity = curve(event.velocity);
    }
    event.trace();
    event.send();
}