19. Arca, 'Xen'
After making a name for himself as a producer on Kanye West's noisy, seething Yeezus, Arca went mysterious and weird on Xen, a full-length debut suffused with ambient atmospheres and darkly hissing mist. Without words to get in the way, Arca — who lives in London after growing up in Venezuela and New York — plays with empty space and shapes drawn by bass, which hits heavy and reverberates. It's music that shivers and shudders, with lots of eerie synth sounds and beats that crinkle and crack. A.B.