How can I intercept audio output?

[C# Programming]

How can I intercept the audio output as it goes to the sound card? is there an audio stream that I can access using .net or third party library?

I'm trying to write a program for correcting lip sync problems when playing back blu-ray discs. I'm hoping to be able to intercept the audio output from the computer and then add an adjustable time delay before sending it back to the audio output again.

Is this possible?

Cheers