Repress. Steeped in improvisational practice and known for their visceral live performances, the pair's sound combines Javanese folk and ritual music with metal and psychedelic influences. Rully Shabara's extended vocal techniques arc from guttural droning to frenetic chants and upper-register ululations, while Wukir Suryadi supplies dynamic instrumentation using the bambuwukir, a self-invented amplified bamboo zither.