https://youtu.be/vxG0eJAoCMY
https://youtu.be/m2-zyzJeEW8

Lucas Niggli: drums, gongs, percussion
Peter Conradin Zumthor: drums, gongs, percussion

Alfred Zimmerlin in the Linernotes:
....Music that is abrasive and hard. Unwavering. Primal. Robotic. The two percussion assemblies don't give off the standard sound of drums and cymbals; metallic sounds - in one sense "impure" - have been prepared instead. Their sound grates even though it is muffled. The sounds of the drums and bells don't ring out and it's difficult to establish their pitch, but every composition is a transparent conglomeration of precisely chosen and balanced sounds. .....They've managed to achieve more than a "snapshot" of a live performance, precisely because, with extreme sensitivity to the kinetic and cathartic character of the compositions, they have created a musical space that allows the disc to be experienced as a complete entity. The speakers send out a work composed of sound, time and space moving in equal measure the listener's mind, heart and body.