I am trying to burn an audio CD using Brasero. With all albums I've tried to burn, Brasero gets stuck at Normalizing tracks:

This is a known bug. The workaround for this problem is to disable the normalization plugin.
In Brasero, go to edit and click Plugins. Remove the checkmark for Normalization.

Solved!!!
sudo apt-get install normalize-audio
The problem is that the dependency with the normalization software is not included. If you install it by hand, brasero will work normally.