From the synthesisers of symphonic rock to the mixes of disco and the samplings of hip hop, music was transformed by the arrival of digital technology and the computer, which gave some songwriters more power but others much less. Along the way Neil talks synths with Rick Wakeman from Yes, samples with Public Enemy's Hank Shocklee, uncovers the surprising lo-fi origins of Bruce Springsteen's stadium-busting Born in the USA, and finds out how Cher changed the sound of her voice on the smash hit Believe.