Listening to Arnold J.’s new single, "Muddy Waters," isn't quite like anything else swirling around right now. It arrives with the gentle insistence of incoming tide, pulling you into its specific gravity. Arnold J., Ghanaian-born and now Canada-based, weaves a sound tagged as alt-country and folk, but those labels feel thin, like trying to contain smoke. There’s earthiness, sure, but his soulful vocal lines...

To understand a song like “Over And Over,” you first have to understand the road it travelled to get here. This is not a track that sprang fully formed from a young artist’s ambition. It’s a gnarled, weathered thing, carrying the dust of a long and winding path. The artist, Block, is a name that echoes from the raucous, DIY-spirited New York anti-folk scene of...