What is the best filter for a very narrow bandpass operating in the 500 - 1500 Hz range. It needs to be as narrow (several Hz) and brick-wall as possible. I have been getting okay results with four concatenated biquads with each of the four sections used (16 instances total). I have tried using the filter Q with what seems like a high setting of 5 - 25 to get the best results.
Would I be better off going to a lower sampling rate and skip the library?
Would I be better off going to a lower sampling rate and skip the library?