C# - Audio Library

Question

Hi,
with my C# project I want to record speech from a microphone and simultaneously put out the speech over a loudspeaker. And also I want to compare the spocken words from the microphone with the already saved audio sample before. It sould be not a speech pattern recognition. Only a compare if the spocken text similar to the saved audio sample. Maybe with FFT.

I found with google three librarys which could be useful for my project:

- NAudio
- Bass
- DirectX

Maybe you have experience about on of the librarys and can tell me the advantages and/or disadvantages of the librarys relating for my project ?

Which library should I take ?

Right know I would prefere NAudio ..., but I'am not sure.

Thanks,
Lestan