Soothin’ Summer Sounds @ Mathews Memorial Library is “Hitting a High Note Again” with Art Muroff & Friends “a classy jazz” group. Art Muroff, born and educated in Brooklyn, N.Y., began studying the piano at the age of five. “Every mother wanted her son to be a concert pianist,” says Art, but he wound up veering off into the world of jazz and pop instead. At 13 he was playing with various jazz orchestras, although he had specialized in classical…