zeroCrossCounter(double input, double thresh){
    static double xzc;
    static double xc;

        int ysgn = hsgn(input, thresh);
    int xzc = kzc(ysgn, xzc);
    int yzc = hzc(ysgn, xzc);
    int xc = kc(yzc, xc);
    return 0;
}

int hsgn(double input, double thresh){
        int ret;
        if(input > math.abs(thresh))
                ret = 1;
        else if(input < math.abs(thresh))
                ret = -1;
        else
                ret = 0;

        return ret;
}