In addition to American Routes’ weekly mix of enduring and eclectic musical styles, we interview old and new school alternative country artists. Willis Alan Ramsey, the cult musical hero from Austin, Texas who wrote “Muskrat Love,” released one very successful country folk album in the ’70s — then all but disappeared from the music scene. Neko Case, a former punk drummer turned country chanteuse, serenades us in the studio, and talks about her atmospheric recent album “Blacklisted.”