Link o' the day: a couple of DSP links
You may have noticed a sudden appearance of Fourier transform stuff around here. It's one of the things I've been meaning to get around to playing with for a while, and when I saw Matt Jockers' Syuzhet stuff, I suddenly had a reason. Here's a couple of good links I've found so far:
The Scientist and Engineer's Guide to Digital Signal Processing, by Steven W. Smith, Ph.D. A hefty textbook on signal processing, convolution, Fourier transforms, and so forth, with "Very readable - low math - many examples". It's pretty easy to get bogged down in the math, especially if you're like me, and I know I am. This book looks at the topic from a discrete, programmable standpoint and a use, not derivation, standpoint. It's available online; I'd suggest the PDF versions of the chapters since the HTML version is missing for some chapters.
Think DSP, by Allen B. Downey. An introduction to digital signal processing using Python, by the person who brought you Think Complexity. Still in progress, I believe, but good reading.