Would it be practical to try to use a Teensy 4 fft to display +/- 50khz and 20khz around a center of 455 khz as an aid to peak and center if? I could really use that at work. They are too cheap to buy a spectrum analyzer. Heck the scope I have to use is an old tube one with 20mhz bandwidth. I know I would have to amplify the signal. I think its only about 10 mv peak to peak but could be 100. I can't remember which right now.