The xx established a quiet, icy, minimal indie-pop sound so distinct on their self-titled 2009 debut that any significant changes could’ve alienated their fans. From the start, each member of the London trio was unique and vital: The voices of Romy Madley Croft and Oliver Sim were lonely and sometimes hauntingly entangled, while electronic music auteur Jamie Smith (aka Jamie xx, who’s done official remixes of Adele, Radiohead, and Florence and the Machine) oversaw the musical production. After 2012’s sophomore outing, Coexist, Smith’s masterful solo album from 2015, In Colour, predicted the richer, prettier aspects of the band’s newest LP, January’s I See You. While there’s nothing as exuberant as In Colour’s “I Know There’s Gonna Be (Good Times)” or as massive as its Croft collab “Loud Places,” I See You is bedecked with brighter, more hopeful-sounding textures than ever before, whether a gorgeous vocal harmony, an instrumental flicker, or an effective sample-flip from Smith. Sampha opens.