Audio Missing from my game

Not all of the audio is missing. Everything is fine, music, sfx & voices until you enter the level to fight the master, then there are no voices at all, sfx are fine and so is the music, it didn't sort it out even when reloading the level, but it doesn't hinder you from playing the game. Just asking if anyone else had any problems with the game?

There was also a glitch on the dreamer level where you have to kill 4 monsters before going into a hall with two wheels. One of the monsters ended up half above the floor, so his top half was above the floor with the rest of him below. Kicking him sorted that out though, so maybe it's just one of those glitches where if you turn the camera slightly on other games you can see through walls.