Sounds of the NBC Chimes | The NBC Chimes Museum

Sounds of the NBC Chimes | The NBC Chimes Museum

History of the network's three-note signature with clips of its use over the years and its predecessors. The first clip on this page is of an announcer in 1924 reading a long list of network affiliates, like KSD St. Louis, WGY Schenectady, and WFAA Dallas. The page includes the use of the "fourth chime" -- the final note, repeated -- as an alarm to summon news staff to headquarters and to alert affiliates to imminent breaking news.