recalling DSP

A friend now takes an "Intro to digital signal processing" course in Uni and asked for my help - he finds it hard to get a good grasp on the theory.

I promised to meet him on Saturday, and now I'm skimming over the material, just to recall what it's all about (I studied this a couple of years ago and never used it since).

So, I'm getting reminded just how much I like this stuff. All those cozy little impulse responses, sinc functions, and Fourier transforms thereof... ah...