Last year, the British Library began the "Save our Sounds" project, with the aim of accelerating the digitisation of millions upon millions of lost audio recordings held in its vast archive. The collection includes many rare and previously unreleased recordings of everything from speeches and music to wildlife, street sounds and pirate radio broadcasts. In some respects, it's a race against the clock. Time is taking its toll on ancient formats like the wax cylinder, for example, and the equipment needed to play some formats is extremely hard to come by. There's much to be done, but next month the British Library is celebrating achievements thus far with a free exhibition that "will explore how sound has shaped and influenced our lives since the phonograph was invented in 1877."