Headphone Motion
Some headphones, like the AirPods, contain motion sensors to track the head rotation and motion.
So on supported headphones, the current rotation of the head (in three dimensions) and the head acceleration can be used to control MIDI parameters.
Ports:
roll:
Sideways rotation of the head.
Range: -1.0 to 1.0
pitch:
Up-down rotation of the head.
Range: -1.0 to 1.0
yaw:
Angle of rotation around you.
Range: -1.0 to 1.0
accelerationX:
The x-acceleration value of the head.
Range: -1.0 to 1.0
accelerationY:
The y-acceleration value of the head.
Range: -1.0 to 1.0
accelerationZ:
The z-acceleration value of the head.
Range: -1.0 to 1.0