We would like to share the results of our master thesis, the loop-Ensemble. We used Pure data Extended to develop three interconnectable musical instruments that are able to self-describe their technical principles via interaction. They are supposed to be used by students in higher secondary levels, but can also be enjoyed by anyone else. The three instruments ADD, DRUMBO and JERRY can loosely be assigned to musical roles: Bass, drums and lead. These borders are surmountable very quickly due to their ambivalent sound production. The interconnection of the three instruments in particular supports loop-based play that reminds of electronic dance music as well as sound experiments. We will give a short demonstration that focuses on open educational resources (OERs), the ensemble itself and its pedagogical possibilities. After that we can fire them up and start making some noise.