Matthew Vann has always been a storyteller, but the pen wasn’t always his instrument of choice: his earliest love was music. Now a cello player, Vann has fond memories of growing up with a piano in the house. “I would always bang on the piano,” he says. “My sister would throw things at me to make me stop.” He pauses briefly, his hands outstretched as if recalling the touch of the keys. “One day, the banging –“ he plays an inaudible chord – “converted into a melodic line.” Vann was hooked. He began formal piano lessons at 9 or 10 …