The Lawrence brothers -- AKA Disclosure -- are back with a brand new track, "Holding On." The first single off of their much-anticipated (and as-yet-untitled) sophomore album, "Holding On" features vocals from Grammy Award-winning jazz singer, Gregory Porter. And though the track at its core is a dense 2-step loop with a nostalgic, '90s-tinged nod, it's greatly enhanced by Porter's velvety, jazz-ballad vocals, which seep into the song and amplify the bubbling synthwork to truly transcendent level. Listen to it below.