Christ", and "Ulceration". The remaining three songs were re-recorded elsewhere: "Sangre de Niños" ("Children's Blood" in Spanish) was re-recorded in 1993 and was included on the Cry Now, Cry Later compilation under the "Factoría de Miedo" moniker, and was the only studio recording to feature then-bassist Andrew Shives; "Concrete" (renamed as "Concreto") was re-recorded in 1995 and was included as a b-side for the "Dog Day Sunrise" single during the Demanufacture era, and was later included on certain editions of the Obsolete album; and "Soulwomb" (renamed as "Soulwound") was re-recorded in 1998 and was included as a b-side for the "Resurrection" single, and was later included on certain editions of the Obsolete album. "Piss Christ" is not the same song as "Pisschrist", which appears on Demanufacture. "Ulceration" is named after the band's original name. The opening guitar riff in "Echoes of Innocence" was used as a synthesized motif in "A Therapy for Pain", the final track on Demanufacture. The title also appears in that song as a lyric. Release After its shelving, the Concrete demo was never leaked onto the internet. In 2002, following the band's breakup, Ross Robinson sold the master tapes of Concrete to Roadrunner for $10,000. The album was subsequently released under the name Concrete. The band's opinions on its release have been divided. Dino Cazares was happy about the release; "It's something special for the kids, who never even heard it. They can see where we were coming from. Back then, we were gigging in East L.A. We didn't really have too much recording under our belts. We had recorded a couple of demos before that, but we had never worked with a producer like Ross Robinson." Alternatively, Burton C. Bell was annoyed that Robinson had gone behind the band's back to sell the masters without the band's consent. Track listing Credits Writing, performance and production credits are adapted from the album liner notes. Personnel Fear Factory Burton C. Bell − vocals Dino Cazares − guitar, bass Raymond Herrera − drums Andy Romero − bass (credited, but did not perform) Additional musicians Dave Gibney − spoken word intro on "Big God", vocals on "Raped Souls" Production Ross Robinson − production, engineering, mixing Mikey Davis − engineering, mixing Eddy Schreyer − mastering Visual art t42design – art direction, design Howard Rosenberg – photography (cover) Rick Ferdinande – photography (band) Studios Blackie Lawless's Fort Apache Studio, Los Angeles,