welcome to Apocalypse Audio, your haven for DIY guitar effects in the end times. so, start prayin to the fuzz gods, savin up those parts, and remember, when the big one goes off- keep your transistors shielded from those pesky electromagnetic pulses!

6.8.10

NATIONAL SEMI AN-779

national semiconductor application note number 779 is a great resource on active, passive and switched capacitor filters.  check it out!


http://www.national.com/an/AN/AN-779.pdf

as a bonus, here is a page on designing state variable filters for audio.

https://pantherfile.uwm.edu/msw/www/StateVariable/index.html
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