Plotting F0 with librosa

[William Hobbs]

Hi all! I apologize if this is way too basic, but I just can't figure out how to get an array of simple frequencies from a wav file in librosa. I would eventually like to make a graph plotting fundamental frequencies against time. I have no doubt that a module as fancy as this one would allow that, but I don't see how to do it. Can anyone help? Thanks! William

[Tiago Tavares]

Hi William, 

I believe what you are looking for is to open a wave file then calculate the F0 in short-time frames. From the documentation  (https://librosa.org/doc/latest/generated/librosa.pyin.html#librosa.pyin), you get a straightforward example:

y, sr = librosa.load('some_wavefile.wav')
f0, voiced_flag, voiced_probs = librosa.pyin(y, fmin=librosa.note_to_hz('C2'), fmax=librosa.note_to_hz('C7'))

Then, f0 will have your fundamental frequency array.

I hope this helps!!

Tiago

On Sat, Apr 10, 2021 at 12:07 AM William Hobbs <hobbsbu...@gmail.com> wrote:

Hi all! I apologize if this is way too basic, but I just can't figure out how to get an array of simple frequencies from a wav file in librosa. I would eventually like to make a graph plotting fundamental frequencies against time. I have no doubt that a module as fancy as this one would allow that, but I don't see how to do it. Can anyone help? Thanks! William

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Tiago F. Tavares

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http://www.dca.fee.unicamp.br/~tavares

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