You lucky, lucky people!
The Whittaker Library database page provides a link to the British Library Sounds website - it used to be called Archival Sounds Recordings, so you might not have realised that there's been a name-change.
There is so much there! The homepage is http://sounds.bl.uk/, and it encompasses all this:-
You'll realise immediately that there is something here for just about every performer in the Royal Conservatoire of Scotland! Actors - take a look at the first couple of categories. Musicians - well, it's obvious, really! Jazz? Yes, it's there. Scottish musicians and community musicians will find plenty under the oral history, world and traditional music headings.
There are more useful links here:-