Greenwich Time Signal Greenwich Time Signal The Greenwich Time Signal (GTS), popularly known as the pips, is a series of six short tones broadcast at one-second intervals by many BBC Radio stations. The pips were introduced in 1924 and have been generated by the BBC since 1990 to mark the precise start of each hour. Their utility in calibration is diminishing as digital broadcasting entails time lags. There are six pips (short beeps) in total, which occur on each of the 5 seconds leading up to the hour and on the hour itself. Each pip is a 1 kHz tone (about halfway between
BBC Sound Archive BBC Sound Archive The BBC Sound Archive is a collection of audio recordings maintained by the BBC and founded in 1936. Its recordings date back to the late 19th century and include many rare items, including contemporary speeches by public and political figures, folk music, British dialects and sound effects. The BBC began broadcasting in 1922 but nothing was recorded until ten years later. At that time, only one recording machine, a Blattnerphone, was available, so few programmes were recorded. By 1936 a number of gramophone recordings had been made, and a temporary secretary, Marie Slocombe was given the task