Normalizing an audio file with PyDub

Sometimes you'll have audio files where the speech is loud in some portions and quiet in others. Having this variance in volume can hinder transcription.

Luckily, PyDub's effects module has a function called normalize() which finds the maximum volume of an AudioSegment, then adjusts the rest of the AudioSegment to be in proportion. This means the quiet parts will get a volume boost.

You can listen to an example of an audio file which starts as loud then goes quiet, loud_then_quiet.wav, here.

In this exercise, you'll use normalize() to normalize the volume of our file, making it sound more like this.

Import AudioSegment from PyDub and normalize from the PyDub's effects module.
Import the target audio file, loud_then_quiet.wav and save it to loud_then_quiet.
Normalize the imported audio file using the normalize() function and save it to normalized_loud_then_quiet.

Take Hint (-30 XP)

Exercise

Normalizing an audio file with PyDub

Instructions