"They've been remastered before, let's get clear about that," explains Newton. "And I'm quite aware, as well, that I've bought remastered albums of bands that sound awful…and I wanted to make sure that this was something special."

The project saw Iron Maiden remaster all 15 studio albums, 2 Best Of collections and 2 live albums from their original analogue sources exclusively for iTunes.

"The Mastering For iTunes procedure allows the listener to experience the music as close as possible to the way the artist intended it to be heard," says bassist Steve Harris. "So of course I was very keen for the Maiden albums to be mastered in this way.