Pandaléon is an indie band from St-Bernardin, Ontario, who mastered the technique of build-up and release. Atone, their debut album, surprises with artful shifts in mood, tempo and, in the case of “Pythagore” and the title track, ambient sound. On songs like “Bulk Tank,” their sprawling, scorching indie rock threatens to swallow the earth whole, while “Retour” and “Klondike” move with a glacial pace before swiftly catching fire.