Hard rock fans have been waiting for this for a LONG time. The reformation of the godfather's of heavy metal, Black Sabbath. Ozzy Osbourne, Tony Iommi and Geezer Butler have been hard at work on the band's first album together since 1978 (drummer Bill Ward was unable to work out a satisfactory deal to come back to the band) Rage Against the Machine drummer Brad Wilk is sitting behind the kit for the recording.

Butler says '13' will remind fans of the early Sabbath albums with the rawness of the sound, but he says one thing has definitely changed in the band dynamic in that all of the principle players are completely sober.

Butler says they work from 1pm to 6pm to keep it fresh for everyone, including legendary producer Rick Rubin. Black Sabbath's '13' is expected in June with more tour dates also in the works.

Below is an interview Butler recently did with L.A.'s KCAL radio and talk more in depth about the new album.