Jon Gold’s new single, "Lullaby for a Dream," is an act of gorgeous disorientation. You see the name—a pianist rooted in the intricate soils of jazz—and you prepare for one thing, but what arrives is a mist-laden skiff drifting from an entirely different shore. Gold, a Delaware musician, has composed a piece of British-Gaelic folk, and the cognitive dissonance is half the immediate magic....

That is the intended emotional response to music. When people relate to you on a deeper level, they are more likely to stick around for the trip. Rapper G4ZZA of the United Kingdom is back with another rap tune titled "On Reflection" that speaks to the universal truths and emotions that many people experience daily but find difficult to articulate. The intensity of this song, which...