This disclosure pertains to Theremin-based positioning. In general, Theremin technology may operate based on changes in frequency that may be induced in a signal when a certain object (e.g., a user's hand) is proximate to a capacitive electrode. An example system may comprise at least four capacitive electrodes in an arrangement that reacts to proximate objects. A change in frequency sensed for any of the at least four capacitive electrodes may trigger a determination of distance from each of the capacitive electrodes to the object based on the frequency change, and a determination of object positioning data based on the distances. Embodiments may include, for example, the ability to verify the arrangement of the at least four capacitive electrodes, determine object position and/or orientation in a coordinate system referenced to the at least four capacitive electrodes, determine object motion, provide the positioning data to a requesting application, etc.