How to convert a .wav file to a spectrogram in Python3?

To convert a .wav file to a spectrogram in python3, we can take the following steps −

Load a .wav file from local machine.
Compute a spectrogram with consecutive Fourier transforms using spectrogram() method.
Create a pseudocolor plot with a non-regular rectangular grid using pcolormesh() method.
Use imshow() method with spectrogram.
To display the figure, use show() method.

Example

import matplotlib.pyplot as plt
from scipy import signal
from scipy.io import wavfile
plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True
sample_rate, samples = wavfile.read('test.wav')
frequencies, times, spectrogram = signal.spectrogram(samples, sample_rate)
plt.pcolormesh(times, frequencies, spectrogram, shading='flat')
plt.imshow(spectrogram)
plt.show()

Output

Rishikesh Kumar Rishi

Updated on: 2021-05-11T12:25:40+05:30

2K+ Views

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