The first encounter with Asta Bria’s new single, “Dragonfly,” is a calculated disorientation. For an artist who once cozied up to funk’s leisurely sway, this is a sharp turn onto a rain-slicked digital highway. The song’s intent for the dance floor is immediately apparent; a commanding, four-to-the-floor beat acts as a gravitational field, pinning you to the present moment. But hovering just above it...

Janet Devlin’s new single, “Houston,” arrives as a gleeful contradiction, a two-stepping Americana anthem for the sovereign state of one. It has all the upbeat, country-rock fixings for a roadside sing-along, yet its heart is miles away, floating in a self-imposed, wonderfully stubborn vacuum. The track opens, and you’re ready for a communal good time; instead, you find yourself at a party where the...