The Philadelphia-based Dr. Dog are part of a long tradition of D.I.Y. pop oddballs who blend unapologetic ’60s pop worship with lo-fi recording techniques and an apparent disregard for current trends. The group began as a part-time offshoot of the more traditional indie rock act Raccoon. Over the course of several years, guitarist Toby Leaman and drummer Scott McMicken found enough free time to record the casual, sprawling 35-track set The Psychedelic Swamp in a basement rehearsal space, finally self-releasing it in 2001. As Raccoon ended, McMicken and Leaman transformed Dr. Dog into a proper band, with McMicken on guitar and Leaman on bass (the two shared songwriting and vocals), as well as guitarist Doug O’Donnell, keyboard player Zach Miller, and drummer Juston Stens. This lineup recorded 2003’s more focused and poppy Toothbrush, which — like The Psychedelic Swamp — received a low-key, self-distributed release.