When Berklee-trained singer-songwriter Arum Rae was being courted by a major label last year, the former Austin, Texas resident (currently located in Brooklyn) booked recording time for a demo with Jim Eno, the drummer and producer for Spoon who helped develop the punchy, minimalist aesthetic that’s become one of that band’s defining characteristics. The deal never came through, and Rae is now presenting the demos as an EP (her second this year) of “lost” recordings.