The first five tracks on this Can release of dubious authenticity were taken from the famous Can free concert in Cologne, Germany, on February 3, 1972. This is the audio from the same concert documented by the video item of the out of print Can Box set, and the audio quality is quite good and the performances are outstanding. On these tracks, the group locks into one long, propulsive groove after another, blending minimalism with improvisation. Whereas "Spoon" and "Paperhouse" diverge quite a bi…