Listening to RIOT SON’s new single, “Loneliest at Best,” is a curious exercise in emotional time-travel. The sound pulls you back to the early 2000s, to a time of angular guitars and heartfelt, frayed-collar vocals. It has that nervous, shimmering energy of indie rock that always sounded best on a pair of wired headphones, the beat prodding you forward even as the lyrics confess...

Listening to John Keenan’s “Wreckage of the Past” feels like being handed the audio diary of a ghost who is not yet dead. This is an 18-song excavation of a psyche at war, made all the more intense by the knowledge that Keenan is the sole architect—producer, writer, mixer, and tormented protagonist. The whole project has the hermetically sealed, slightly feverish quality of a...