There's a brilliant (and free) book called The Scientist and Engineer's Guide to Digital Signal Processing which covers this and other DSP topics. It's very rea

There's a brilliant (and free) book called The Scientist and Engineer's Guide to Digital Signal Processing which covers this and other DSP topics. It's very readable and clear - I found it super useful in understanding DSP and the maths surrounding it. Most of the time the actual stuff happening is quite simple, but if you're not living and breathing mathematical notation the conventional explanations can be quite impenetrable. This book puts everything out in code, so you can follow the steps and truly understand what's happening. http://www.dspguide.com/ http://www.dspguide.com/