If you like to strain for satisfaction, Douglas Armour might be the dude for you. His sweet but barely audible voice has a hard time rising above the house music of “Trembling, on the Verge” or “Towards the Light.” His descending melodies in “Not An(Other) Love Song” are ambitious, but they lack the volume to stick in your chest. Even when his programmed dance music steps aside for his vocals, as on the winsome closer, “The Mystery It Never Lasts,” Armour keeps it too hushed to sway you. And that’s what dance music is supposed to do. An able debut, but one hopes his sophomore effort doesn’t slump as noticeably.