Meaning he's got lots of guest vocalists on the Probot record...

DAVE GROHL has likened his latest heavy metal PROBOT side project to SANTANA’s ‘SUPERNATURAL’ record.

Featuring Grohl, Zwan guitarist Matt Sweeney and Foo Fighters producer Adam Kasper, the band have enlisted the help of metal vocalists to sing on the tracks, ranging from Slayer‘s Lemmy to Napalm Death’s Lee Dorrian.

“It’s not unlike the Santana record in that it really kicks ass, but it’s not the kind of thing that you’d expect,” the Foo Fighters frontman said. “There’s a kind of person that will like the Probot record, and there aren’t many of those people… I mean, it’s not meant to, like, make money.”

The project has been evolving for three years and the album is expected to be released in early August. The record will also include vocal contributions from [a][/a]’s Tom Araya, King Diamond, Celtic Frost’s Thomas Gabriel Warrior, Venom’s Cronos, Corrosion of Conformity’s Mike Dean and Voivod’s Snake.

Speaking to MTV News, Grohl added, “After recording a bunch of it, a friend of mine said, ‘Wow, you know what would be really cool if you could get a different vocalist to sing on each thing.’ And then I picked of my favourite vocalists from that specific genre of music, underground metal from like ’83 to ’89.”