Adriana Spuria’s new single, “Stone,” presents itself with the polished feel of a perfect skipping-stone, but listening closely reveals it has the curious weight of a fossil in your palm. Spuria sings of a very specific, modern affliction: the slow petrification of the heart. This is a loneliness born not from solitude, but from an inability to feel for anyone else, an insulation that...

Seishin Takeno's "Echoes," a sonic postcard from Kanagawa. Nine instrumental pieces, I've been told. Not nine songs, mind you – more like nine shaded windows into a particular kind of quiet. This isn't music that yells; it leans in, like a friend confiding a secret you half-hear on a summer porch. Immediately, you're not so much listening as remembering. Or maybe anticipating. It feels...