proximation-of-a-square-signal-by-additive-synthesis">Example 6: Approximation of a square signal by additive synthesis</h3>
<p>We saw earlier how to produce a perfect square wave signal. This perfect square signal contains an infinite number of harmonics which, due to sampling, will fold over the audible spectrum, resulting in a less accurate, noisy sound! A square signal can be approximated by additive synthesis, by adding an infinite series of odd harmonics (see <a href="https://en.wikipedia.org/wiki/Squ