 Since Grohl felt the songs were different from the band's previous input and "had the potential to be something great", he considered that instead of doing something like the last three albums, the band had to go out of "our own comfort zone" and "needed someone to push us out of there".So Grohl decided to work again with Gil Norton, who produced the band's second album "The Colour and the Shape", citing how Norton taught the band of the importance of pre-production and refining the composition, and claiming Norton's "unconventional" approach "seems to capture the best of this band", considering that with him "we're not going to do a straightforward AC/DC record, he's gonna make it different".Preparation was extensive