The father is a dress maker and the mother is a fiction writer. It doesn't seem to have anything to do with what work they do, as far as I can tell. I don't think it's coming from the workshop.. I think it's above that a little. It sounds a little like a live electrical wire that's come loose, but the clicking is rather rhythmic. It's been awhile since I've played VV3, but I think I heard the same sound there, too, and never figured out what it was.