Cellist Aron Zelkowicz is the founder and director of the Pittsburgh Jewish Music Festival which presents rare and diverse works from Jewish musical traditions. In his new album with pianist Christina Wright-Ivanova, Zelkowicz presents late 20th and early 21st century works by six American composers—Carter Pann, Gabriela Lena Frank, Kevin Puts, Margaret Bonds, Stacy Garrop, and Stephen Paulus. Though quintessentially …