Librosa pitch tracking - STFT

Question

I am using this algorithm to detect the pitch of this audio file. As you can hear, it is an E2 note played on a guitar with a bit of noise in the background.

I gene

Answer 1

Turns out the way to pick the pitch at a certain frame t is simple:

def detect_pitch(y, sr, t):
  index = magnitudes[:, t].argmax()
  pitch = pitches[index, t]

  return pitch

First getting the bin of the strongest frequency by looking at the magnitudes array, and then finding the pitch at pitches[index, t].