Notes on audio visualization

[leios]

Notes on Audio visualization

1. We can plot frequencies with FFT
   a. what window function should we use: https://en.wikipedia.org/wiki/Window_function#Hann_and_Hamming_windows
   b. Should we use Goertzel: https://en.wikipedia.org/wiki/Goertzel_algorithm
2. In visualization of frequencies, resonance is structural and can be found by sweeping through all notes: https://boomspeaker.com/speaker-resonant-frequency/#Free_Air_Resonance
3. pitch analysis -> visual