Taku Unami has been working with boxes for the past 15 years at least. Not because he works in a shipping warehouse, but because he finds them alluring objects for performance art. In a 2011 performance with Radu Malfatti that’s been immortalized on ErstLive 012, his instrument of choice was a load of cardboard boxes that he silently stacked and rearranged like a worker ant while Malfatti softly puffed on his trombone. Without knowledge of what occurred at that concert, Unami almost seems a non-factor—but once you’re aware of his presence you can’t help concentrating attentively to piece together a mental picture of those gentle jostling sounds. On bot box boxes, he’s once again the conductor of a quiet cardboard orchestra. It leaves more to the imagination that it does to listen for, which makes it an engaging piece in fascinating extra-musical ways.