Aditya Ong Quartet is a jazz ensemble from Surakarta featuring piano, bass, guitar, and drum. Get your tickets at javajazzfestival.com. Pay1Get2 myBCA promo valid until April 30th, 2026. #JavaJazzFest2026 #JJF2026 #JavaJazzFestival2026 #myBCAJavaJazzFest #AdityaOngQuartet