- I'm Anatole Garron of the Opera.
- Oh, I'm so sorry. This is Inspector Daubert, of the Sûreté.

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

You can hear this line at 00:34:58.831 in the Blu-ray version of the movie.

Quote context

[...]

- They call this rehearsing, monsieur.

- I'm sorry to intrude, but I must see you, Christine.

- Well, you see, I'm busy right now...

- Christine! Please remember that you are speaking to a gentleman.

- Well... Come in, Raoul.

- Anatole, well, he's been helping me.

- Oh, Monsieur is very kind.

- Not at all, monsieur. I find it a pleasure.

- I'm Anatole Garron of the Opera.

- Oh, I'm so sorry. This is Inspector Daubert, of the Sûreté.

- I've heard of you, Monsieur Inspector. Your work must be exciting.

- Not so exciting as yours, monsieur. It doesn't lend itself to self-expression.

- I didn't recognize that delightful song you were singing, Christine. But as you know, I am no connoisseur of the opera.

- It's not from an opera, Raoul. It's a lullaby.

- A lullaby. It didn't seem very effective as a lullaby.

- Well, you see, Monsieur Inspector, a song is capable of many interpretations by a musician.

- By a detective, too. Though no doubt the detective is usually mistaken.

[...]