… is an interactive performance work, mediated by several sensorial technologies, that explores contemporary transversal forms of artistic languages. The result is the creation of a unique vocabulary articulated physically, through interactive soundscapes, visual composition and real time choreography; an array of artistic expressions that support the dramaturgic intention. [Multimedia National Prize 2010, Art and Culture).
Stephan has written about the creative process of .txt extensively in his PhD dissertation (Chapter 4 on HCI strategies in the pogramming of .txt). You can download the thesis here: https://www.repository.utl.pt/bitstream/10400.5/3775/2/dissertation.pdf