This software enhancement adds Dr. Paul Swingle’s subliminal sound technology to the basic neurofeedback protocols, providing a new level of feedback, based upon Dr. Paul Swingle’s research and development in this area. The enhancement consists of a set of subliminal sounds in BrainMaster compatible .wav files; and a set of protocols that use the sounds in recommended neurofeedback protocols. For investigational/research use. All Windows™ systems.