NX Head Tracker
Designed and developed by Waves Audio. This bluetooth head tracker mounts to the headband of any headphones and connects to the NX family of plugins. It provides real-time information about the position of your head. It is required to accurately emulate HRTF psychoacoustics with DSP. Or as our friend Steven would say, with binaural technology.
In combination with a webcam it provides higher resolution of movements and even lateral movements. For example, getting closer to the speakers or moving away from them.
Calibration with room modeling and a head tracker is the closest you can get to a perfectly calibrated and emulated studio environment on headphones. First class audio magic, period.