The Wunderkammer Interface is a nonhierarchical composition that invites an improvising musician to interact with twenty-five modules of composed digital audio processing. The musician who is engaging with the interface has the option to activate these modules independently, as a progression, or as overlapping processing schemes. The Wunderkammer Interface was designed in the SuperCollider audio processing environment. The interactive structure of The Wunderkammer Interface is based on the fluidity between the roles of creator, participant, and listener possible through this work. The performances described in this paper demonstrate unique realizations of The Wunderkammer Interface through different interactions with the interface.