Compare old and new pose via a relative quaternion rather than relative yaw, then calculate the resulting yaw-difference from the quaternion in one go.
It's now possible to rotate the playspace by turning the controller during a virtual move playspace drag. The feature is activated via a checkbox on the playspace tab. If X Y Z axis lock checkboxes are also checked only rotation will be applied. Offsets will still accumulate as the user swings the playspace around because rotation is now centered at head. This feature is intended for use with manual redirected walking (allowing the user to virtually walk in a straight line while walking circles in physical space). This distance walked is reflected in the X,Z offsets.
When audio devices connected or disconnected from the system, the default audio device swapped around. This was because of QML setting index 0 on ComboBox.model changes. onCurrentIndexChanged was calling setPlaybackDeviceIndex() / mirrorDevice/ micDevice etc... in the audio tab controller and actively setting the audio device index to 0 momentarily. Changing onCurrentIndexChanged to onActivated allows the ComboBox to only actively command the audio tab controller in direct response to user interaction.
Kung-vr