In the genetic soup of American music, rock and soul are inseparable: both born from blues, both rooted in rawness and expression over precision and poise. Surveying the ’60s until now, here’s a playlist of tracks that fall somewhere between standard definitions: rock songs with the ache of soul, soul songs with the momentum of rock—the gritty end of American roots. Our editors update picks here regularly, so if you hear something you like, add it to your library.