Percussion, helped also by alternative playing techniques and amplification, enabled true exploration of the uncharted depths of sound. They revealed a world in constant transformation, where every sound is no longer conceived as a fixed and immutable entity (no longer limited to the notion of "note"), but contains within itself, in it's becoming, multiplicities. An organic yet unstable ensemble in which it is possible to find all the elements necessary for elaborating compositional processes and diverse musical solutions. The pieces presented in Indeterminate State fall within contemporary musical experimentation, as each composition arises as an investigation of the ancestral sonorities of indeterminatepitch percussion, relying on multiple opportunities offered by electronic and digital technologies. The works, commissioned by Keyhole and Loxosconcept for the MA/IN Festival, were realised during an artistic residency in the municipality of Brienza (PZ), where a heterogeneous group of six composers - Maurizio Azzan, Giulio Colangelo, Stylianos Dimou, Marta Gentilucci, Sarah Nemtsov, and Cesare Saldicco - collaborated directly with percussionist Fabio Macchia. The relationship established between composers and performer represented a key element of a shared creative process, typical of contemporary music, developing through a virtuous dynamic. The compositional path originates from the musical language and finds reflection in the instruments used, mutually influencing the stylistic expression of each author and, consequently, the form of each piece. This process, nourished by a multidirectional exchange of knowledge and intuitions, takes shape from the interaction between the composers' imagination, the performer's technical skills, and the percussion ensemble, initially proposed by the musician and later expanded in the compositional phase. The entire path is further enriched by the integration of electronic technologies, resulting in an open map of sonic experiences revealed over the time of listening.