A lost archive of the first electronic music ever created including the Doctor Who theme has been restored in Manchester.
Working in the BBC's Radiophonic Workshop in the 1960s, Delia Derbyshire used primitive recording equipment to make electronic sounds that had never been heard before.
The techniques she developed were used to create the Doctor Who theme and changed the sound of modern music forever, influencing bands from Pink Floyd to The Chemical Brothers.
Delia died in 2001 but, using hundreds of tapes found in her attic, a unique digital archive of her music is being established at the NOVARS Research Centre in Manchester.
The story of Delia Derbyshire is told on Inside Out North West at 7.30pm on BBC One, 22 November 2010