- What is it, madame?
- I don't know. I...

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

You can hear this line at 00:45:36.381 in the Blu-ray version of the movie.

Quote context

[...]

- Christine, you're going to be a great and famous singer. I'll help you. (2)

- What's the matter?

- Why, someone just said the very same thing to me a moment ago in my room.

- Someone? Who?

- I don't know. It was just a voice.

- I knew you'd hear me sooner or later.

- You mean it was you?

- Of course. I don't mean actually, but I've been saying that ever since I saw you and heard you sing. And at last, you heard me.

- Your cue, monsieur.

- I'll tell you again tonight, at supper.

- What is it, madame?

- I don't know. I...

- Help me! Monsieur Vercheres! Madame.

- You, get the doctor. Quickly. Take her to her dressing room.

- What could have happened?

- What?

- Mademoiselle DuBois, you must go on at once. Madame Biancarolli has been taken ill. Please get changed quickly.

[...]