Unkindness of Raven, or UKOR, was launched in 1991 as an experimental producer of unconventional sound. UKOR is a large ensemble that always changes the quality of their sound through playing traditional and self-constructed instruments. Their music could be grouped with Noise music or Musique concrete; but UKOR preferred to be described as a 'musical scribble', due to its method of recording and composing. UKOR records the music first and composes the songs last.