Music as a form of expression exists across all cultural and geographic barriers. It has been called the “universal language,” but is it truly a language that is understood universally? How did it become so prevalent in societies across the globe? WNYC’s John Schaefer talks with musician Bobby McFerrin and neuroscientist Jamshed Bharucha in order to shed light on the nature of music, how our brain decodes it, and why we can all “speak” it.