How did record producer Mark Ronson coax out Amy Winehouse's signature sound in her hit song "Rehab"? And how was a guitar maker named Lester Polsfuss partly responsible for changing the sound of every song we hear on the radio today? Those are some of the stories revealed in the new PBS documentary series "Soundbreaking," which takes viewers behind-the-scenes on how big advances in sound technology impacted everything from the Beach Boys to MTV and hip-hop. We take a peek inside the eight-part series, which features interviews with Paul McCartney, Tom Petty, Questlove, Brian Eno, Run-D.M.C. and others.