This paper is a comparative analysis between two digitally mediated live poetry performances: Frikativ by Jörg Piringer and This Loud by Amy X Neuburg. More specifically, I examine how these poets use digital technology in their live performances to challenge traditional notions of the human voice. My main argument is that their modes of exerting controlling over their voices ultimately serve similar purposes; those of establishing the voice as a relationship between speaker and listener, a phenomenon rather than a discreet object or bodily organ possible to observe on its own. This phenomenological point of view draws on Karen Barad’s concept of posthumanist performativity as well as on philosophical works on the voice, such as Mladen Dolar's A Voice and Nothing More. Moreover, I give an historical account of sound poetry, tape poetry and tape loops as they relate to Frikativ and This Loud. In this, I also discuss live-looping; a technique used by both Piringer and Neuburg and connect it to Gilles Deleuze's ideas of difference and repetition. Finally, Piringer's and Neuburg's works is compared based on how they attempt to control the voices-as-relations in their performances. My conclusion is that Frikativ constantly destabilizes the establishment and recognition of voice-as-relation. This Loud, due to the extensive and focused use of live-looping, does not destabilize as much as it multiplies the possible configurations of voices-as-relations.