If you can, find another zed (good chance for a little impromptu meet) and listen to see if it sounds the same or get one of the members from here to listen. I think you will find it will sound the same.
I thought as you did that something was wrong as the noise was unnerving. When I depressed the clutch the noise went, when up there seems to be lots of chatter. but then I found it was one of the characteristics of the car and that they all did it. Just make sure it is that and not something more serious.