Bobby McFerrin Demonstrates the Power of the Pentatonic Scale posted in Blog on 04/08/2009 by admin SHARE Tweet World Science Festival 2009: Bobby McFerrin Demonstrates the Power of the Pentatonic Scale Source: vimeo.com Bobby McFerrin demonstrates the power of the pentatonic scale, using audience participation, at the event “Notes & Neurons: In Search of the Common Chorus”, from the 2009 World Science Festival, June 12, 2009.