Cul de Sac is perhaps the best American band to assimilate the repetitive pulse of early-’70s German space-rock groups like Neu and Can. I Don’t Want to Go to Bed, the band’s second album, is culled from practice sessions between 1990 and ’93. While the disc’s direct-to-two-track recording quality is sub par, the multilayered, instrumental drones the quartet creates are uniformly fascinating. Sound effects galore swoop though such 10-minute-plus tracks as “Abandoned Hospital” and “Graveyard for Robot,” but they never seem gratuitous. Robin Amos’ gurgling synths mingle with such mysteriously named instruments as the “contraption” and the “g.d. flexitone,” swirling in time with Chris Guttmacher’s hypnotic drumming. But it’s Glenn Jones’ effects-heavy guitar that defines the group’s personality. As with Pram and Stereolab, Cul de Sac’s musicality is informed by its Kraut-rock antecedents, but the band is not merely imitative. Rather, it seems the tradition’s modern heir.