One of the few problems I had with Rogue One was James Earl Jones's voice was a bit too old and weak for the movie. Keep in mind that Rogue One happens right before Episode IV. The cool thing about the movie is they reconstructed the bulkier Vader suit and mask from Episode IV and not the sleeker black one from V and VI. They even restored the brown lens that he wears in IV, which isn’t there for the other two. However, it seems Disney didn’t modify his voice as much as the original movies.
The people making RO went through everything to make sure it fit with Episode IV aesthetics. This was a bit of an oversight. Then again, a bunch of Vader scenes were added at the last moment.
This YouTuber changed that and made his voice more in tune with the voice we know from IV. It is heavier and more robotic. It works with the IV suit and mask. Well, done.
I don’t know why Disney didn’t bother doing this, kind of like Orson Wells in Transformers the Movie.
BTW, this scene uses both Imperial Marches from IV and V.
RIP James Earl Jones.