The Scientist and Engineer's Guide to Digital Signal Processing

[adamnemecek]

http://www.dspguide.com/pdfbook.htm

[acdanger]

Reminds me of the always entertaining blog of Oona Räisänen: http://www.windytan.com/ (she very well might recommend this book somewhere on her site).

It's amazing what one can hear if one spends the effort to truly listen.

[tsomctl]

An excellent book for anyone interested in anything that has a frequency. The whole field is based on a simple but brilliant idea: using convolution and an impulse response to model anything linear. I encourage you to at least read the first several chapters; it is useful to a lot of different fields.

[reitanqild]

To anyone who goes for the comments first, like me, the complete book is available online for free.