waveform.py

# Imports to download the wav file. Not necessary for local files.
from requests import get
from io import BytesIO

# Import to read the wav file.
from scipy.io import wavfile

# Import to plot the waveform.
import matplotlib.pyplot as plt


'''
Download a wav file
For a local file could be a simple
    filepath == r'/path/to/file.wav'
'''
url = r'https://www.pacdv.com/sounds/voices/nice-work.wav'
response = get(url)
file_handler = BytesIO(response.content)

# Read the wave file to numpy array
fs,  signal = wavfile.read(file_handler)
channel_0 = signal[:,0]
channel_1 = signal[:,1]

# Plotting
fig, axes = plt.subplots(nrows=2)
axes[0].plot(channel_0, 'b')
axes[1].plot(channel_1, 'r')
plt.show()