Part 1: Using Virtualdub to extract the audio track
Next, select the video file you want to make the MP3s from. For an example, I’ll be using Shinigami no Ballad.
Finally, click on file->save WAV, and select a location and a name for the audio file.
Now we have an audio file of the whole show. We’ll need to use Audacity to select the parts we want (in this case, the Opening and Ending song).