Celebrating the most powerful of all instruments--the human voice--the third episode of Soundbreaking surveys the range of ingredients that go into a perfect vocal track. At once the most fundamental component of a song and the most challenging to capture, the vocal track is the product of a complex collaboration between performer, producer, and sound engineer--a titrate of artistic commitment, compelling concept, and technical wizardry that, at its best, turns a lyric into the soul of the song. Featuring rare studio footage of some the world's most renowned vocalists--from blues divas to suave crooners to rock star screamers--the show considers the gamut of tricks and techniques that can both enhance and alter the human voice, and explores the ineffable emotional quality that makes a vocal track truly great.