The Infinite Impulse Response (IIR) biquad filter is a simple to implement digital filter while allowing the modification of any signal in a variety of strategic ways. These filters can be then cascaded allowing further control of the resulting output. It should be noted that the coefficients a and b are swapped compared to those…

Did you know square waves as we know them are generated by summing a series of sine waves? In this blog I will provide a little square wave example written in octave. Worth nothing the peak of the dominant wave is larger than the peak of the square wave. To get a more perfect square…