damon

filterkernals

(

    var bandwidth = 0.1;
    var lowKernel;
    var highKernel;
    var bandKernel;
    var maxValue = 0;
    var ratio;
    var normalize = 1;

    m = 4/bandwidth; //length of filter kernel

// newClear creates a new empty array with the size you specify
    lowKernel = Array.newClear(m+1); //initialising a low pass filter kernel

    for(0, m, {|i|
        if(i != m, {
            lowKernel[i] = ((sin(2pi*150*(i - m/2)))/(i- m/2))*(0.42 - 0.5*cos(2pi*i/m) + 0.08*cos(4pi*i/m));

        },
        {
            lowKernel[i] = 2pi*150;
        });
        lowKernel[i].value.postln;
    });

    lowKernel = lowKernel.normalizeSum;


    highKernel = Array.newClear(m+1);

    for(0, m, {|i|
        if(i % 2 == 0,{
            highKernel[i] = lowKernel[i].value*(-1);
        },
        {
            highKernel[i] = lowKernel[i].value;
        });
    });

    bandKernel = Array.newClear(m+1);

    for(0, m, {|i|
        bandKernel[i] = lowKernel[i].value * highKernel[i].value;
    });

    bandKernel.plot;
)