Before he was a key part of Sandwell District, Dave ‘Function’ Sumner was a leading light in New York’s '90s techno scene. As these tracks show, Sumner has never lacked a deft production touch. 'F3' is led by dubby beats and clanking, hissing percussion, with insistent vocal snatches added to the arrangement and a nod to the city’s tribal house sound. 'F4' is more techno-focused and sees tonal bleeps and chiming bells fused with a rough and grainy rhythm. That both tracks sound as fresh as Inland’s chord-surging edit of 'Shift F1' is testament to Sumner’s superior production skills.