LEADER 00000nz 2200000n 4500 110 2 British Library.|bNational Sound Archive 410 1 National Sound Archive. 410 1 British Library Sound Archive 510 1 British Institute of Recorded Sound 667 British Institute of Recorded Sound became the National Sound Archive, then the British Library National Sound Archive and is currently the British Library Sound Archive. Currently we have no materials from its period as the British Library Sound Archive, so we have a 'see' rather than a 'see also' reference for that form of name. RL. 26/5/11.