Dan Abrams’ Shuttle358 project delivers more icy ambience with the OPTIMAL.LP., an intensely focused, quiet album. “Swarm” travels from some feedback loops into a gentle melody, letting the crackles of static segue into “Slowly In…,” which itself ends on some long tones. Abrams has a knack for tracks that start off sonically dense, then filter out into a minimalist simplicity. The album, as a whole, slides so easily from one track to the next, that it would be tempting to think of this project as a futuristic soundtrack—-say to a meditative science fiction movie like Tartovsky’s Solaris. I can see the title track, “Optimal” as part of a tense shuttle-docking sequence, while “System” is the joyous reunion between man and machine. And “Tank” closes out the album with more drift than the title would imply.