First of all, I installed Mok's patch awhile ago, before I attempted the Rev4mod. Unfortunately, I don't remember whether these problems were caused by the mod or Mok's patch because I really wasn't paying attention to them until this got mentioned here.

Footsteps: Sometimes I can hear them and sometimes I can't. I haven't tested it, but it might be by region (?) I believe this is caused by the mod because I noticed this right away when I started playing it.

Music: I have none now, although it did play at the very beginning of the game when it did not have the "new.lod" (so I would see the movie) and was too loud then - and I noticed the loudness so think it is due to the mod. After the intro, however, the music went away and never came back. All the other sounds play all right. The "3DO" at the beginning was always too loud and still is. What I'm not sure about is whether I had music absent during the game after installing Mok's patch but before playing the mod. I did not turn off the music myself.