captainsolo said:

As I understood it, Uni was too cheap to pay music licensing and would re-score source cues and potentially remix the audio. The 1995 signature LD restored the original music and should be the original mono in PCM. I figured the DVD was a lossy port of this, and the BD a slightly higher res copy.

There was a piece of music that was replaced in The Invisible Man in the scene where Griffin sneaks into Kemp's house and every release of the film until the BluRay and 2014 DVD had the replaced song. As a result there were a few sound effects missing from the rescored version such as the sound of the door closing as Griffin enters the house.