Probot was a heavy metal recording project led by American musician Dave Grohl, as a side project from his primary group Foo Fighters. The album was released in February 2004.
The album's cover art was created by Voivod drummer Michel Langevin.
Dave Grohl played the majority of instruments on the album, including all of the drum tracks.
From top to bottom: Kim Thayil and Matt Sweeney played additional guitar parts on the album. Cronos and Lemmy played bass guitar on the songs they sang, while Wino and Jack Black played guitar on the tracks on which they sang.
The singers featured on Probot are, from top to bottom: Cronos, Max Cavalera, Lemmy, Mike Dean, Kurt Brecht, Lee Dorrian, Wino, Tom G. Warrior, Snake, Eric Wagner, King Diamond, and Jack Black.
Conrad Thomas Lant, also known by his stage name Cronos, is an English musician. He is the founder, vocalist, and bassist of the thrash/black metal band Venom.
Probot
…singers from this era which is '82 to '89 underground metal, and all the bands I listened to at the time: Eric Wagner from Trouble, Snake from Voivod, Cronos [from Venom], Lemmy and Wino," and started contacting the musicians, some of whom were reached by Grohl's friend Matt Sweeney given the Foo Fighters…
Cronos performing with Venom in 2013
Cronos with Venom in 2013