the Greek without any input from anyone, as it wasn't originally going to be an official release. But I think everyone was impressed with it; certainly Jimmy said he was. Then, when Jimmy decided to do a new [Led Zeppelin] DVD, he started looking for someone familiar with the modern applications necessary for surround sound mixing. If you listen to the Royal Albert Hall [concert] opening in 5.1, you can see Jimmy had this audio concept really early on of giving people a sense of the band going onstage and the audience swells around you. We had a meeting to discuss the requirements needed for the DVD project audio, and afterward, he asked if I would be interested in ‘helping’ him. Page, with Shirley and the producer and creative director Dick Carruthers, worked for the best part of a year to research, compile, load, mix and present the material. Much of the footage which was included on the DVD was painstakingly restored for several months, before being mixed at Sarm West Studios in London. In all, 132 cans of film and two sets of two-inch video tape were examined for the project. In order to view material on the two-inch Quadruplex videotapes, a suitable playback machine had to be located. A working Quadruplex machine was finally found in Singapore. Some of the video tapes suffered from a common fault called sticky-shed syndrome where the bonding agent holding the magnetic particles to the tape backing decomposes to the point where the oxide is scraped off during playback. The tapes consequently had to be restored by baking them in ovens at 55 °C (131 °F) for three weeks in order for them to be played back. The audio portions were digitally remixed for stereo and 5.1 surround mixes. Critical reception Upon its release the DVD received positive reviews. Michael Azerrad of Rolling Stone magazine gave the DVD four (out of four) stars, describing it as the "Holy Grail of heavy metal" and "one of the best rock documentaries ever made." Commercial performance The RIAA certified Led Zeppelin DVD at 13 times multi-platinum (1,300,000 copies sold in the United States). According to the BBC, the DVD broke all sales records for a music video, nearly three times as many in the first week of sales as the previous record holder. It was, for three years, the highest selling music DVD in the United