Discovery is the second studio album by the French house duo Daft Punk, released in March 2001. It marks a shift in the sound from Chicago house, which they were previously known for, to disco, post-disco and synthpop-inspired house. The album provided itself as a soundtrack to the anime film Interstella 5555: The 5tory of the 5ecret 5tar 5ystem, which was a collaboration between the creators of the album, Leiji Matsumoto, and Toei Animation. All of the music videos for the tracks on the album are segments of the film. Interstella 5555 follows a story of a kidnapped extraterrestrial band. Discovery is recognized as a concept album in reviews by New Musical Express and Spin magazines. Early versions of the album included a "Daft Club" membership card. The card included a code which granted access to an online music service, which featured tracks later released on the album of the same name and Alive 1997. Theme According to an interview with Remix Magazine Online, Thomas Bangalter stated: This album has a lot to do with our childhood and the memories of the state we were in at that stage of our lives. It's about our personal relationship to that time. It's less of a tribute to the music from 1975 to 1985 as an era, and more about focusing on the time when we were zero to ten years old. When you're a child you don't judge or analyze music. You just like it because you like it. You're not concerned with whether it's cool or not. Sometimes you might relate to just one thing