For math, all empty clusters are equal, so it is possible to speak of a single cluster with no elements. The center of the city of São Paulo, in particular, is full of these contrasts. The work Connections generated a conductive environment to this observation. Sounds were related with simple geometric elements for the creation of a full and empty space at the same time. The simple fact of the people walking by the street of Quitanda already provided the necessary subsidy to the existence of the installation. Without the flow of people, work would be a hodgepodge of empty technology. The work and the public merged into this ephemeral and at the same time perceptible architecture.