rec new-file.wav

rec -b 16 -r 16000 new-file.wav

import sounddevice as sd
from scipy.io.wavfile import write

fs = 44100  # Sample rate
seconds = 3  # Duration of recording

myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=1)
sd.wait()  # Wait until recording is finished
write('output.wav', fs, myrecording)  # Save as WAV file 

import IPython.display as ipd
import matplotlib.pyplot as plt
ipd.Audio('output.wav')
plt.plot(myrecording)