Two loudspeakers were just five meters apart, both cranked up at full volume in the complex of the Student Activity Unit (UKM) at the Bandung Institute of Technology (ITB). The loudspeakers of the UKM Harmoni Amal Titian Ilmu (HATI) group projected a discussion, while the loudspeaker of the UKM band played the sound of a guitar.

Those two competing sounds livened up the ITB campus on Jalan Ganesha No. 7, Bandung, West Java, on Thursday night thr