Abstract — The artifact ecologies emerging from an increasing number of interactive digital artifacts, capable of communicating with each other wirelessly, have created an interaction space where software applications are no longer limited by the physical boundaries of a single device. With the new opportunities follows an added complexity that interaction designers need to address. Previous work have shown the potential of proxemic interactions as one way of dealing with design challenges of ubicomp systems. However, the work focused on interactions involving multiple digital artifacts is limited. In this paper, we analyze two multi-artifact systems from our prior work within the domain of music consumption and identify four concepts of multi-artifact interactions: Plasticity, migration, complementarity, and multi-user. These concepts forms the basis for a discussion on the potential use of proxemic interactions in the design of multi-artifact systems. Keywords- artifact ecology, multi-artifact systems, proxemic interactions, music systems. I
