ilovefuzz.com

http://www.moogmusic.com/sight-and-sound/product_demo/moog-ladder-filter
Bob Moog is being inducted into the inventors hall of fame for his patent on the Moog ladder filter.

that's really cool. it's a really fantastic design, i had one in my old arp odyssey. you could even set the keyboard up to do microtonal sine wave scalings with just the filter.