Hi Rich, thanks for those links, I'll check them out :). ---------- Forwarded message ---------- From: "Rich Caloggero" To: Cc: Date: Thu, 22 May 2014 17:11:45 -0400 Subject: Re: [chuck-users] Filters and filter education This may help: http://www.analog.com/en/content/scientist_engineers_guide/fca.html The subject is daunting. I'm a computer person so I understand the computer bits, but the math is still a stretch for me. This guy does a good job explaining things both in words and in code. Best part is that its free and available online, or you can download the html. -- Rich