...if you sit near the MSNBC set, you may want to turn down your computer speakers. Since the primary coverage Tuesday night, TVNewser has been getting a lot of these kinds of emails:

what is that occasional 'beeping' sound on msnbc--it's off camera somewhere and terribly annoying. and no, i'm not crazy.

No, anonymous emailer, you're not crazy. The beeping comes from the AP newsalerts which feed into the newsroom computer systems at the networks. In MSNBC's case, many NBC News employees sit adjacent to the set and the anchors' microphones pick up the 'beeping.'