Bridged T Peak Filter - LTSpice Simulation and Audio Tryout

This can create some interesting audio effects for music such as a wah-wah effect, or the scanning/sweeping filtering effect heard in some electronic music where the sound seems to hollow out as the resonant peak scans through the audio band.

Starting from a passive Bridged-T notch/band reject filter, this project uses an op amp to transform the filter into a bridged T peak filter, and using a potentiometer, the resonant peak can be moved within the audio range from below 100Hz to around 14.5 KHz.

This project includes an LTSpice simulation and a breadboard prototype with some audio examples.

LTSpice Files:
https://github.com/GadgetReboot/misc_...

RC Filter Topics
http://www.johnhearfield.com/RC/RC4.htm
http://sengpielaudio.com/calculator-b...
https://sound-au.com/articles/active-...
https://tf.nist.gov/general/pdf/2526.pdf

Music used in the demo from the Youtube library:
Andrew Huang - Hyped
Max McFerren - At The Game
Quincas Moreira - Shoelace

Support me on Patreon:   / gadgetreboot