Just as a followup to this, what I did was find the sound files:
Quote:"sounds\ui" and all sounds "sanity_drain_*"
I ran them through
Audacity, using a 'chain' (in File menu I think) to run: pitch reduced by about 90%, bass boosted, a bit of echo added, to all those files in one batch. Then saved them into the same location with the same file names. This make them sound more like rocks falling in the distance than somebody crushing some tinfoil in their hand.
Now I still get the sound to let me know when Daniel is being a Mr Grumpypants, but it doesn't make me want to put my hands over my ears. Yay!
I just went down the elevator. Scary game is scary. :O