YouTube clip. On December 10, 2007, Led Zeppelin took the stage at London’s O2 Arena to headline a tribute concert for dear friend and Atlantic Records founder Ahmet Ertegun. What followed was a two-hour-plus tour de force of the band’s signature blues-infused rock ’n’ roll that instantly became part of the legend of Led Zeppelin. 5 years in the making, we were very pleased to be asked to oversee the mastering of the audio for all the cinema and video releases.