Ava Valianti represents something increasingly rare in contemporary music: genuine precocity without artifice. This Massachusetts artist, who is only fifteen years old, handles general themes with a level of emotional depth that is shocking. She shows that youth can bring out the best in complicated human experiences, rather than hiding them. "Distant," her sixth single, functions as a sonic archaeology of friendship's dissolution. The track excavates layers...

Take Jack Horton, a Portland-based singer-songwriter whose path to folk-Americana included stops at Japanese law school, Tokyo piano bars, corporate boardrooms, and government offices. His latest EP, "Imperfections," feels like finding someone's private journal set to music. And that someone happens to write really, really well. The five-song collection opens with "Set Me Free," a piano-driven confession that might surprise anyone expecting typical breakup bitterness. Horton...