Wendy Carlos proved it with her futuristic Switched-On Bach, a historic recording on the Moog synthesizer, a type of early synthesizer invented by Bob Moog.

NPR: Bach In Translation: From Jazz Vocals To Electronic Blips

Last month the castle's owner, Historic Scotland, blamed the wet weather for a drop in visitor numbers, after recording a 9% decrease over the summer.

BBC: Edinburgh Castle 'best heritage attraction'

These are just a few sounds of the 20th century being added to the National Recording Registry on Thursday for long-term preservation due to their cultural, artistic and historic importance.

WSJ: Sounds of Simon, Garfunkel chosen for preservation