- So you have turned detective, monsieur?
- I have.
- Very well, if it amuses you. But I advise you to confine your hobby to the entertainment of yourself and your friends.

— Raoul Dubert (Edgar Barrier)

8 seconds sound clip from the Phantom of the Opera (1943) movie soundboard.

You can hear this line at 01:04:08.828 in the Blu-ray version of the movie.

Quote context

[...]

- You are wrong, monsieur. I'm sorry, Christine. They are going to reopen the Opera, but without you.

- Circumstances connected with the murder of Biancarolli demand that someone else sing the role in your place.

- Really? You may be interested to know, Monsieur Daubert, that circumstances connected with the murder of Biancarolli demand that Christine does sing.

- Really? I am aware that your profession requires a certain self-assurance, but aren't you going too far?

- Not at all.

- I have a plan of my own for apprehending the murderer.

- So you have turned detective, monsieur?

- I have.

- Very well, if it amuses you. But I advise you to confine your hobby to the entertainment of yourself and your friends.

- Now let's not waste words, monsieur.

- I've been assured by Messieurs Amiot and Lecours that as soon as the Opera reopens, Mademoiselle DuBois will sing.

- And I might add that my plan is strictly confidential.

- I'm sorry, Christine, but in my official capacity, I have had to order Messieurs Amiot and Lecours not to permit you to sing. At least not for the present.

[...]