Check out the book in the iBookstore here : https://itunes.apple.com/nl/book/audi...
'Audio engineering - Spectral processing' is the second book in a series of audio engineering books. This book is all about frequencies, filters, equalizers, and a whole lot more!
Compared to any other printed audio-engineering book, which usually have around 4 pages about equalizers AND filters, this highly interactive abook contains over 80 pages all about frequencies, equalizers and filters!
It is a very interactive book with many feaures like good looking images, illustrations, sound examples and videos and it's now available in the iBooks-format in the iBookstore on iPad!