Even Skyrim needs Bane, but sadly Bethesda didn't add him anywhere, so its up to me to make Bane. I have MP3 sound files that I want to use for his dialogue, is there a way that I can insert those instead of recording like normal? I don't know if creation kit supports MP3 but its no problem to convert it to WAV if I need to.

Convert to .wav (16 bit, mono, 44100 hz)

Ok but then how do I insert it instead of pressing record? Do I click the select sound button? If I do that it's a list of sounds. If that is the way, where is it inside the Skyrim directory so I can put a new file.