bbc.co.uk: "Sometimes called 'Source music', 'Mood Music' or as it's best known, 'Library music': a hugely important part of British sonic history. Its use and purpose is simple: it's well produced, economic music for film, TV, advertising and radio. Never commercially available to the general public, this music was pressed onto vinyl from the 1950s onwards in short, limited quantities and then sent directly to TV production houses and radio stations for use when necessary.

In this first ever documentary about library music we'll look into its history (starting in 1909), speak with the dynastic library owners. We find out what's it's like to make music to imaginary pictures by speaking to the library music makers (which could include Jimmy Page and Brian Eno), and even have a word with the Musicians Union who banned UK recording of library music throughout the late 60s.

• Listen to the documentary at www.bbc.co.uk
• found via thewire.co.uk