Christian Fennesz turns processed guitar into gauzy ambient music; King Midas Sound pairs The Bug's heavyweight bass with reggae singer Roger Robinson's ethereal voice. The two acts' collaborative debut mostly focuses on the dreamier end of the spectrum, like the dubbed-out strumming and lonesome whispers of "Mysteries" or the gorgeous, shimmering drones of "Waves" and "Above Water". But the low end lurches to the fore on "On My Mind" and "Loving or Leaving", two beautifully doomy tracks that amplify trip-hop's melancholy by piling claustrophobic atmospheres atop skeletal beats and ghostly vocals.