An anti-folk couple fond of estate and garage sales form a lo-fi indie pop band with their pre-teen daughter on drums and harmony vocals; together, they craft upbeat songs drawn from discarded vacation slides. That’s the leap-years-from-cliché story of the Trachtenburg Family Slideshow Players. With obtuse yet catchy songs that flitted from eggs to mountain voyages to public executions or wherever the slideshow images carried them, Jason, Tina, and Rachel Trachtenburg built a post-hipster D.I.Y. empire in the early-‘00s.