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. 26: Sci-Fi Sound Effects BBC Sound Effects No. 26: Sci-Fi Sound Effects BBC Sound Effects No. 26: Sci-Fi Sound Effects is a 1981 compilation of sound effects and atmospheres created by the BBC Radiophonic Workshop. It was the second in the BBC Sound Effects series to be credited to the Workshop. It featured sounds from popular television series "Doctor Who" (all from Season 18) and "Blake's 7", as well as effects for the first series of the radio versions of Douglas Adams' "The Hitchhiker's Guide to the Galaxy" and James Follett's "Earthsearch". In 1991 it was re-released on CD as "Essential Science Fiction Sound