Skee Mask's deep, immersive productions and eclectic, genre-less DJ sets have made him one of the most intriguing and sought-after names in electronic music.Actress, meanwhile, is one of contemporary electronic music’s great composers, a pioneer and a philosopher who has helped push the sounds of the club far beyond the dancefloor - don’t miss his collaboration with Suzanne Ciani, ‘Concrète Waves’, at Sónar by Day this year. At Sónar by Night you’ll find him firmly in club mode, swapping tracks with the equally enigmatic German artist. This is one back-to-back that promises to have heads spinning.