Abstract This project’s starting point is An Cloch Labhrais (The Speaking Stone), a huge glacial erratic made from conglomerate puddingstone rock. Located in Co. Waterford in Ireland, it is known as a ‘truth’ telling oracle stone. According to legend, the dramatic crack in the stone occurred after a woman perjured herself in its presence – her untruth causing it to split in two. Mouthnotes reclaims the stone’s split, and reimagines it as a mouth from which a multitude of utterances and un/speakable things leak and spill. In this disorderly form of self-expression, non-conforming vocalisations flow up to her mouth and out through her tongue (Carson, 2005). Through the logic of the the vocal warm-up, the work simultaneously stutters and echoes the order of language, numeracy, and structured behaviour. Breaking away from preconfigured expectations and narratives, mouths and voices separate and reunite, unearthing an imagined enunciation (LaBelle, 2014). In the work, these plural erratic agencies emerge through a series of audio-visual polyvocal Mouthnotes.