I went down a rabbit hole looking for this and researching it. The audio version that can be found pretty easily is fake; the actual audio was never released.May I recommend “not listening” to Timothy Treadwell and his girlfriend being mauled and eaten alive. The camera was rolling but the lens cap was thankfully still on. Pretty disturbing to listen to.
The audio was definitely disturbing when I listed to it before I found out it was fake. Regardless, you can imagine that it was probably close enough to the real audio and couldn't have been a pleasant way to go.