Quantum (album)

Quantum is the third studio album by instrumental rock/progressive metal supergroup Planet X, released in 2007 through Inside Out Music. Guitarist Allan Holdsworth was originally slated to feature on most tracks, but ended up not finishing the project. As a result, his solos remain only on "Desert Girl" and "The Thinking Stone".

Critical reception
François Couture at AllMusic gave Quantum four stars out of five, calling it "a quantum leap above previous Planet X releases" and "a surprisingly mature album". He praised the album's stronger compositions and better diversity over previous Planet X material, and listed "Alien Hip Hop", "Matrix Gate", "Space Foam", "Kingdom of Dreams" and "Desert Girl" as highlights.

In a 2012 article by MusicRadar, Dream Theater drummer Mike Mangini ranked the album tenth in his list of most influential drum albums.

Personnel

 * Derek Sherinian – keyboard, producer
 * Virgil Donati – drums, orchestration, producer

Collaborators
 * Brett Garsed – guitar, producer
 * Allan Holdsworth – additional guitar solos (tracks 2, 4)
 * Jimmy Johnson – bass (except tracks 5, 9)
 * Rufus Philpot – bass (tracks 5, 9)
 * Matt Flinker – engineering
 * Jamie Black – engineering
 * Steve Scanlon – mixing (except track 9), mastering
 * Simon Phillips – mixing (track 9)