While the electric field sensing technique is based on the front end of the original Theremin circuit topology, it is done entirely in the digital domain using the CREATE USB Interface (CUI), and the ThereminVision-II. The interface to the computer is accomplished by detecting timing signals using custom firmware for the CUI, and sending the four proximity values to the host as continuous ranges (16-bits each) at an update rate of 100Hz. Using four channels of capacitive sensing makes it possible for the MMMS to provide full 3-dimensional input - the collective E-fields of all four antennas are used to determine the Z-axis gestural input. In this way, different sensing modalities are used to reinforce one another where each has advantages and disadvantages (e.g. capacitive sensing is better at Z-axis tracking than computer vision).

Below is a video of Lance Putnam demonstrating the electric field sensing capabilities during initial prototype testing of the Multi-Modal Music Stand.