The great tragedy of music is that so many high-quality albums go unheard. Blame it on the glut of material released every year or the fact that the majority of artists don't have the big-budget promotional push to bring their records to the masses. With the year more than half over, we looked at LPs that deserve a second (or, in some cases, even first) listen, from big-name country releases like Dwight Yoakam's Second Hand Heart and Kristian Bush's Southern Gravity to the sublime singer-songwriter fare of Butch Walker and Kasey Chambers. Here are 30 albums from 2015 that you probably haven't, but really should listen to in their entirety.