Milwaukee-by-way-of-Brooklyn singer-songwriter Frank Gappa released his debut full-length album last week. With nine songs, Gappa incorporates garage rock and post-punk flavors into the mix, delivering catchy grooves and lyrical reflections of profoundly difficult life navigation. Trudging with intense conviction, Gappa balances ambling melancholia with polished pop sensibility on “Let Me Show You My Jean Jacket”, resonant with the modern adult