如何从python中的wav文件绘制波形？

Question

import os
import scipy.io
import scipy.io.wavfile
import numpy as np
import matplotlib.pyplot as plt
dataset_path = os.path.join(os.environ['HOME'], 'shared', 'data', 'assignment_1')
wavedata = os.path.join(dataset_path, 'example.wav')
   
fs, audio_buffer = scipy.io.wavfile.read(wavedata)

And I kinda cannot understand how to further use matplotlib.pyplot Would be grateful for any advice or right documentation!

Answer 1

this will plot the wav audio file in its native time domain as a time series

import os
import scipy.io
import scipy.io.wavfile
import numpy as np
import matplotlib.pyplot as plt

myAudioFilename = 'aaa.wav'  #  plot this wav file     ~/audio/aaa.wav

dataset_path = os.path.join(os.environ['HOME'], 'audio') # homedir -> audiodir -> my wav files
wavedata = os.path.join(dataset_path, myAudioFilename)
   
sampleRate, audioBuffer = scipy.io.wavfile.read(wavedata)

duration = len(audioBuffer)/sampleRate

time = np.arange(0,duration,1/sampleRate) #time vector

plt.plot(time,audioBuffer)
plt.xlabel('Time [s]')
plt.ylabel('Amplitude')
plt.title(myAudioFilename)
plt.show()