Last month, UK producer/vocalist Gang Colours took the next step in his evolution as an artist, delivering his sophomore LP, Invisible in Your City, via Brownswood. Now, longtime San Francisco house authority Dave Aju (pictured above) has been enlisted to remix album standout "Why Didn't You Call?"—a somber, piano-led tune which features additional vocal contributions from Lulu James. In Aju's hands, the reflective effort is deftly spun into more groovy territory, thanks to his addition of a low-swung shuffle, some airy synth work, and the occasional appearance of handmade FX freakouts. And for those curious as to how the original version sounds, the video for Gang Colours' "Why Didn't You Call?" can be watched after the jump.