For the average player, Skyrim - Voices-en0.bsa works silently in the background. But for modders and power users, this file is a frequent source of both utility and frustration.

stands for Bethesda Softworks Archive . It is a proprietary file format used by Bethesda Game Studios for their Gamebryo and Creation Engine games (think Morrowind, Oblivion, Skyrim, and Fallout).