It's hard to believe, but only a few centuries ago, young boys were castrated for the sole purpose of preserving their high-pitched singing voices. These boys—commonly referred to as Castrati—started out singing the high parts in church choirs, but, with the surging popularity of opera, soon amassed fame reminiscent of our modern pop stars. Listen as Between the Liner notes talks with Castrati expert Martha Feldman and Switched on Pop's Charlie Harding about this unique piece of Europe's musical past.