Substance compiles the four singles released by the band that did not appear on albums — "Transmission", "Komakino", "Love Will Tear Us Apart", and "Atmosphere" — as well as most of their B-sides. It also collects tracks released on extended play singles, the band's first release An Ideal for Living, and two samplers issued by Factory Records, A Factory Sample and Earcom 2: Contradiction. The single "Atmosphere" had been originally issued in France as "Licht und Blindheit" with "Dead Souls" on the B-side. Following the death of Ian Curtis, it was reissued as a posthumous B-side of the "She's Lost Control" single in an alternate version from the track that had previously appeared on Unknown Pleasures. The vinyl version omits the single "Komakino" and does not include the complete titles from the extended plays. [source]This record was important because, unless you had the singles, it was the only way to own Transmission, Love Will Tear Us Apart, and Atmosphere. I have the original Canadian pressing. This, like the other JD records, have all been repressed.