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...

Musicians who can create magic by drawing into their origins have a certain captivating and true quality about them. Sista Mika, whose given name is Sophia Michalakoudis, is a living monument to the genuineness of that culture. Sista Mika was born in Brussels with a Greek background. She grew up to the rhythmic rhythms of rebetiko, Greece's response to blues and reggae, a lyrical story of...