Here are some links to very interesting and useful sites:
http://manleylabs.comhttp://www.digido.comhttp://www.gearslutz.comhttp://src.infinitewave.cahttp://www.tapeop.comhttp://www.lenardaudio.com/education/01_eduintro.htmlhttp://www.sengpielaudio.com/calculator-db.htmhttp://mixonline.com/index.html
http://soundonsound.comhttp://www.ascap.com/index.aspxhttp://omniaaudio.com"There are two kinds of fools… One says: this is old and therefore good. The other says: this is new and therefore better." Bob Katz