I get the same thing. Very specifically a "whiny" noise that starts when the DAE loads and ends when I exit Pro Tools. From reading the thread on gearslutz and playing with it myself I get the sense this is a hardware issue rather than software so I don't think the next update will help us out much. The thing I'm really scratching my head about is, why haven't more people complained about this problem. If it is a hardware issue shouldn't everyone experience it? I noticed that there is a post on the digi website about it:
http://www.digidesign.com/index.cfm?...0&itemid=21549
so there must be others who have complained. It seems that there must be users who have properly working systems though, or else everyone would be complaining? So is the problem just with some Mbox 2s or has it been fixed after a certain revision?
Maybe it's just that there are lots of people only monitoring through the headphone jack. On mine the headphone jack is crystal clear. Which is another strange thing. Why is the headphone jack immune to the whine?
questions, questions, question...