Numpy Beginner's Guide (Update)

Time for action – replaying audio clips

We will download a WAV file of Austin Powers exclaiming "Smashing baby". This file can be converted to a NumPy array with the read() function from the scipy.io.wavfile module. The write() function from the same package will be used to create a new WAV file at the end of this section. We will further use the tile() function to replay the audio clip several times.

1. Read the file with the read() function:

   sample_rate, data = wavfile.read(WAV_FILE)

   This gives us two items – sample rate and audio data. For this section we are only interested in the audio data.

2. Apply the tile() function:

   repeated = np.tile(data, 4)

3. Write a new file with the write() function:

   wavfile.write("repeated_yababy.wav", sample_rate, repeated) ...