Kyiv native Poly Chain (Sasha Zakrevska) makes brightly pulsing electronic music infused with mystery. Her debut album, 2017’s Music for Candy Shops, folded bittersweet ambient melodies crackling rhythms reminiscent of ’90s IDM; on 2019’s transporting +/-, a pair of 15-minute synth excursions rippled like cosmic waves. Her most substantial release to date remains Currency, released late in 2019 on Warsaw’s Mondoj label. Twitching and flickering...