This paper outlines the development and application of Gestate, a prototype non-tactile gestural system intended for the augmentation of vocal and piano performance. Influenced by embodied and experiential mapping approaches, the design builds on a performer's existing movement language and patterns by mapping ancillary movements to digital signal processing and virtual instrument parameters. The mapping strategies employed in the Gestate system address the absence of haptic feedback inherent in non-tactile interfaces by providing additional cues for the performer in the form of visual feedback. Reflections on the prototyping process and subsequent performances provide insights into the experience of integrating gestural technologies in contemporary performance practice.