Timo Maas doesn’t usually get fans of obscure dance music too pumped, so it’s surprising when Innervisions purveyor DJ Dixon kicks off his latest mix with Maas’ subdued “Slip In Electro Kid,” that it works to set a dark, deep, and uber-cool tone. Chromatics’ breathy, ’80s-radio-inspired “In the City” doesn’t hurt either, and before you know it, Dixon’s leading listeners down a retro-tinged path that requires neither heavy beats, bass drops, nor synth arpeggios to keep our attention. A creator of moods rather than a keeper of tech-house’s status quo, Dixon does himself proud with Vol. 4.