3 * rework algorithm setup and padding
4 * make max/min freq configurable
5 * level triggering for on/off
6 * display difference (leds) in not so fine granularity
7 * see if real-only FFT is considerably faster
8 * make sampling freq configurable
9 * make nfft configurable
11 * rename the app to Desafinado, Atunality or something