All .wav files were extracted from a proprietary .spd file. The following tracks were omitted from the "Orochi" folders:
  btlact_voice_pl306_3 (silence)
  btlact_voice_pl306_4 (silence)

The tracks are named according to their position within the .spd file regardless of whether tracks were omitted in the middle. This is because the track position seems to have some correlation with how the track is used in-game.