Adele's vocals on 21 were recorded in Rubin's studio in Los Angeles, where many of the album's songs were also recorded. Adele stated that the producer intended to record the vocals in a manner similar to how she performed live, by projecting her vocals back onto a large, circular mirror, allowing several people in the room to hear her while sitting in a circle behind her; this technique is commonly used by drum and bass producers. Critics noted the record's resemblance to Craig David's 2001 album \"7\", with Adele's vocals appearing distorted and heavy.
The album was released on 10 November, 2008. The European version of 21 includes a deluxe DVD, containing the album's music videos, along with concerts and other special features. American release of the album includes a bonus DVD containing music videos and documentaries relating to the making of 21. Adele said the DVD was a way to share some of the experiences that she and her band had on the album: \"The whole making of the record really is a celebration of the album, rather than a 10 per cent retrospective, because the journey was so complete\".
Adele explains the concept of a \"coming of age\" album in her post-breakup writing process: \"You have this vulnerability. I don't think you're really big enough. You don't really believe in yourself. You're self-preservation there for a short fixed period of time. And then you look around and realise, \"Oh, I'm very young, and I'm very small and I can get hurt.\" And those things are positive things to know. You don't want to over-romanticise relationships. You know when I'm around him now, I'm in a certain space: I love him, I miss him. But it's still fresh.\" d2c66b5586