If you have Sony headphones, you may be able to use them as a headtracker with this free software

Your audio device may have just gotten much more useful.

A free app lets Sony headphones do head tracking for racing and flight sims

Head tracking, often used to enhance awareness in driving and flying games, traditionally requires extra IR tracking hardware ...
Hackaday

Flight Sim Tracking From Spatial Audio

Flight sims are wonderful to play around with to get immersed in the position of a pilot. Racing sims can give you a thrill ...
Tom's Hardware on MSN

Open-source app turns your Sony headphones into real-time head trackers for PC games

A new level of immersion for free.