First of all, a clip from the opera "The Marriage of Figaro" was played. This piece of music must be his favorite.

Secondly, he wants to share the joy of hearing this music with more people, so that they can also experience a moment of freedom and relaxation.

Once again, such a moment gave him the faith and hope to persevere.

Finally, these micro-rebellions indicate that Andy has not been "institutionalized" yet, and he will eventually escape from the prison that restricts his freedom, even at the cost of current lack of freedom.