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 Effects No. 19: Doctor Who Sound Effects BBC Sound Effects No. 19: Doctor Who Sound Effects BBC Sound Effects No. 19: Doctor Who Sound Effects is a 1978 compilation of sound effects by the BBC Radiophonic Workshop from the BBC science fiction series "Doctor Who". It was the first album in the "BBC Sound Effects" series to feature solely Radiophonic Workshop output and also the first commercial release of an album of the "Doctor Who" sound effects and atmospheres. The effects included came from throughout the show's history, covering both Brian Hodgson and Dick Mills' time recording effects for the programme. Effects that did not appear on