Dream Theater: John Myung (bass instrument); James LaBrie, John Petrucci, Jordan Rudess, Mike Portnoy .

Personnel: John Petrucci (vocals, guitar); Mike Portnoy (vocals, drums, percussion); James LaBrie (vocals); Jordan Rudess (lap steel guitar, keyboards); Anne Lehmann, Laura McGinnis, Catherine Ro, Elena Barere, Carol Webb, Katherine LiVolsi Stern, Katherine Fong, Yuri Vodovoz (violin); Karen Dreyfus, Vince Lionti (viola); Richard Locker (cello); Pamela Sklar (flute); Joe Anderer, Stewart Rose (French horn).

Audio Mixer: Michael Brauer.

Recording information: Hit Factory, New York, NY (11/2004-02/2005).

Illustrator: Hugh Syme.

Photographer: Colin Lane.

Prog rockers Dream Theater tallied 19 years as a band with the release of Octavarium, but in listening you're apt to suspect otherwise. As a collective they remain as tight as they were on 2003's obsessively dark Train of Thought (like all music-school outfits, they've exacted an all-for-one formula that doesn't allow a single player more than his share of swagger), but a post-hardcore edge -- call it a leap into 2005 -- has invaded their pledge of allegiance to theatrical heavy rock. Hear it on "I Walk Beside You" and "The Answer Lies Within," both of which, at under five minutes, play like charming haikus from a band known for its epic poetry, and also on the orchestra-backed 20-plus-minute final cut, which skips around from Pink Floyd to Rush to Black Sabbath influences, stopping off every so often at a place fans of My Chemical Romance might find familiar. As with all the band's discs, guitars loom large and both doom and redemption seem no further than the next twisted verse. What's changed is Dream Theater's commitment to carrying on their reputation as underground progressive rock's classicists, and it seems well-timed. ~ Tammy La Gorce

As the sole major-label progressive-metal act, Dream Theater invariably set the standard as the flagship band of the genre. With the numerically themed OCTAVARIUM (including eight tracks signifying the band's eighth release) the shred-rock quintet continues to challenge themselves creatively. Opening track "The Root Of All Evil" picks up the thread that began with "The Glass Prison" (SIX DEGREES OF INNER TURBULENCE) and carried forward to "This Dying Soul" (TRAIN OF THOUGHT). Drummer Mike Portnoy's lyrics for these songs read like a set of deeply personal journal entries documenting his painful recovery experience, further disclosed by a footnote nod to Alcoholics Anonymous co-founder Bill Wilson. OCTAVARIUM chiefly finds Dream Theater stepping back from elaborate fretboard acrobatics, focusing on vocal-based, song-oriented material ("I Walk Beside You," "The Answer Lies Within"); much in the spirit of AWAKE and their breakthrough album IMAGES AND WORDS. "Sacrificed Sons" captures the heartbreak of the 9/11 tragedy, while the grandiose title track showcases a melodic, Styx-inspired keyboard solo by Jordan Rudess (better known for a blisteringly frenetic style). Twenty years since their inception, Dream Theater prevails as the benchmark of modern prog metal.