Well they are whispers, vey low occasionaly whispers but you really need the mod for it to work well, which you can get a Paines site.
They went in and adjusted the frequency, number and volume of the whispers, iir.
Btw it's not the Malk talking it's whispers from his mind.
What you do inthe Warrens is go up to the door in the sewers, use noclip to get the door change level icon and hit use key.
