Cassius, a new addition to the top ranks of French electronica circa 1999, actually comprised two of the scene's most experienced producers: Philippe Zdar and Hubert Blanc-Francart (AKA Boom Bass). Besides their productions for Mo' Wax as La Funk Mob, the duo had also manned the boards for several excellent LPs by French rapper MC Solaar. They first met back in the late '80s, working in the same studio (Zdar was an engineer, and Boom Bass was just learning the trade). Boom Bass worked with MC Solaar, and combined with Zdar to release two EPs on Mo' Wax as La Funk Mob during 1994. Zdar also teamed with Etienne De Crécy (from the Super Discount project) to release an LP as Motorbass. Finally, Philippe Zdar and Boom Bass came together in late 1998 as Cassius. Combining the jazzy hip-hop of Boom Bass with Zdar's phase'n'filter acid-disco, Cassius debuted with the single "Cassius 1999," a club anthem and British Top 20 hit late in 1998. The full-length album "1999" appeared early the following year.
Their second opus, "Au Rêve", was released in 2002 with vocals from Jocelyn Brown (on the single "I'm A Woman"), Steve Edwards (on "The Sound Of Violence"), and Ghostface Killah on "Thrilla".
In 2006, Cassius released "15 Again", a conceptual album with tracks inspired by what they use to listen when they were teenagers. The collaborators included Etienne De Crécy, -M- and Le Knight Club.