The art of circus is a vibrant and competitive culture that embraces new tools and technology. In this paper, a series of exploratory design processes resulting in proofs of concepts are presented, showing strategies for effective use of three different modes of sonic interaction in contemporary circus. Each design process is based on participatory studio work, involving professional circus artists. All of the proofs of concepts have been evaluated, both with studio studies and public circus performances, taking the work beyond theoretical laboratory projects and properly engaging the practice and culture of contemporary circus.The first exploration uses a contortionist’s extreme bodily manipulation as inspiration for sonic manipulations in an accompanying piece of music. The second exploration uses electric amplification of acoustic sounds as a transformative enhancement of existing elements of circus performance. Finally, a sensor based system of real-time sonification of body gestures is explored and ideas from the sonification of dance are translated into the realm of circus.