From the very beginning, The Mars Volta was conceived as more than simply a new vehicle for Omar Rodriguez-Lopez and Cedric Bixler-Zavala. The group was to be a rebirth, a redrawing of their creative frontiers, a repudiation of the stylistic provincialism that had ultimately spelled the end of their previous band, At The Drive-In, a year earlier. So, as The Mars Volta’s debut release, 2002’s Tremulant EP had much to accomplish within its three tracks and 19 minutes: to define the group’s ambitions and their possibilities, to sketch out a limitless horizon for their future adventures, and to shake loose the macho following they’d accrued with At The Drive-In’s final, breakthrough LP Relationship Of Command, the dudes in the moshpit who just wanted to slam-dance to post-hardcore riffs. Tremulant put this uncompromising ethos into play from the very off, first track Cut That City opening with two minutes of amplifier hum, synthesiser scree and drum-machine pulse. “That introduction was immediately going to weed out all the posers,” says Cedric. The music that followed, meanwhile, announced The Mars Volta’s visionary new sound, an embryonic version of everything that would follow.

More than just a portrait of the band in its germinal state, Tremulant captured a Mars Volta that would never exist again, being their sole release with their original bassist. “The EP is a promise of what could have been,” says Omar, noting that Eunuch Provocateur and Cut That City possess a groove unique within the group’s discography, “because Eva was so deep in the pocket.” By the time Tremulant was released – on their own label, at their own expense, part of an ongoing effort on Omar’s part to prove what they could achieve under their own steam – Gardner was gone, and The Mars Volta were about to undergo another crucial metamorphosis. And while, in context of everything that followed, the Tremulant EP might seem like a dry run, a prologue, a pre-echo of what’s to come, it remains an adventurous, confounding and brilliant release in its own right, signalling that The Mars Volta’s unfolding quest would brook no limits and consider no compromises. Beyond this point, there be dragons – but for the fearless, here was an opportunity to climb aboard and take flight.