GDC isn't a huge conference, and should by its own name focus more on the development side, that doesn't mean don't get news or any interesting trailers out of it.
The GameTrak Freedom
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In addition to unveiling the Freedom's new design, PDP also further detailed the controller's advanced motion technology. Like other motion controller solutions, the Freedom uses a series of accelerometers to determine the pitch, roll, and yaw of the device in relation to in-game physics. What sets the Freedom apart from other motion controllers, however, is its use of ultrasonic 3D positioning. The Freedom system includes two sensor bars placed or mounted to the sides of a display, which communicate with an ultrasonic emitter built into the Freedom controller. The ultrasonic pulses emitted by the controller and identified by the sensors, along with the data fed by the accelerometers enable the system to calculate the distance, orientation, and speed of the device with extreme precision. Each Freedom remote (up to four can be used simultaneously on one system) emits three pulses to accurately triangulate distance, and a fourth pulse is emitted for accuracy.
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And comes with its own game,
GDC News/Trailers
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