: A fan-made modification that replaces the English voice acting with the original Japanese audio while keeping the English text.
You cannot use the .001 file on its own; it is only a fragment of the full game. SMTIVA-USA-(UNDUB)-CIA-Ziperto.7z.001
: Once extracted, the .cia file is typically installed onto a 3DS via the FBI homebrew application or played on the Citra emulator. Context of the "Undub" : A fan-made modification that replaces the English