While in Kraków, you might want to check out the following events concurrent or adjacent to DH2016:
CROSSROADS Festival Krakow is an international forum of world music, folk, ethno, ethnojazz, roots and traditional music.
International Choir Festival “Cracovia Cantans” brings choirs from all over the world to Kraków.
The jazz scene in Kraków is always strong, with events such as the Summer Festival.
The Street Theatre Festival will probably find you before you find it yourself.
A few days after the conference, Kraków will host the World Youth Day.