Left clicking a point in the plotting area allows to show the cursor coordinates, while right cliking
shows the plot zoom menu.
Let's now analize in more details the linearization capability of the computed FIR by comparing the
time and frequency domain plots of the IR and the IRxFIR curves, for a flat target magnitude.
In the time domain what we should ideally get is a unitary pulse centered at 0ms (Dirac delta), that is
the TD equivalent to a flat frequency response.
