I need to make an adjustable notch filter for frequencys from 27 to 4200 hz
I want it to be able to detect 8 bands of resolution, 27hz to 55hz would be the first band 2000hz to 4200 hz would be the last band. I need to detect the frequency band within about 1 second.
I am using tiny 13's in the project or tiny 45, tiny 24's 25's or something else if needed.
I also need to auto detect and adjust the input for low level sound environments to high level sounds (Band stage) so that the frequency detector is not saturated at high levels of sound as well as being responsive at lower levels.
Adjustable via a pot.
Low cost around 5 bucks in parts maximum
Any rough ideas on what direction to go in?