In the preview window mouse to the zoom function and click the check box. Now if you press ANY of the numeric keys 0-9 to assign a color class, you will hear the ding. If you uncheck the zoom check box and hit a number key it will ding again. If you ---> to the next image and don't zoom you can assign a color class and there won't be any sound. Checking the zoom checkbox for some reason causes the color class assignment to ding. I REALLY noticed this when I had the sound on my speakers cranked up from an Itunes session and forgot to turn it back down. The full volume ding scared me out of my seat!
Like I said it's been going on for the last few releases. I was just a little cranky when I posted the original msg. I have a new shooter working for me, and I've never had to assign a trash color class to so much junk. So everything was getting on my nerves.
Eric