(CHATHAM, N.Y.) – Pianist Conor Hanick will tackle 20th century Russian composer Galina Ustvolskaya’s Piano Sonatas No. 4, 5, and 6 live at PS21 on Saturday, August 15, as part of PS21’s Modern Music Fest. Seating in PS21’s 350-seat outdoor Pavilion Theater will be distanced and limited to 50. Each concert will run approximately one…