Opening Performance Orchestra is a seven-person musical group from Prague in the Czech Republic. Its members have collaborated (both musically and otherwise) for almost two decades. Since 2006 the group has been engaged in creative musical activity. Opening Performance Orchestra follows in the path of 20th-century avant-garde composers and of Japanese noise music, and is based on so-called “fraction music” and the slogan “no melody, no rhythm, no harmony”. The group has created its own compositions as well as reinterpretations of the works of composers with whom Opening Performance Orchestra feels a kindred spirit.