Home > Posts > HowTo: Upgrade Kinect Audio Positioning code from older Beta SDK

HowTo: Upgrade Kinect Audio Positioning code from older Beta SDK

Exploring the Kinect SDK v1.8 Developer Toolkit Browser application, I noticed some audio positioning visualizations at various samples (specifically at Audio Basics, Audio Explorer and Kinect Explorer samples), but I kept on looking for some simpler/cleaner sample code to return audio positioning info that would be easier to reuse.

So I can across http://kinectaudioposition.codeplex.com that looked like a good candidate, since it was defining a reusable KinectMicArray class to return the BeamAngle and SoundSourceAngle’s of a KinectAudioSource. There was also some sample code on how to use that KinectMicArray class at http://channel9.msdn.com/coding4fun/kinect/Kinect-Audio-Positioning

However, after downloading it, I realized it was written (hadn’t seen the notice it had on its page) for an older Kinect Beta SDK version. So I decided to port that code to Kinect SDK v1.8 (which is the latest Kinect SDK version to support Kinect for Windows v1.0 and Kinect for Xbox 360 sensors, since the newer Kinect SDK supports KfW v2.0 and Kinect for Xbox One – in fact KfW v2.0 is now “merged” with the Kinect for Xbox One product via the use of an external adapter with the later to connect to a PC).

During that code porting to Kinect SDK v1.8 I noticed the following issues that had to be addressed. At the older Kinect Beta SDK:

  • one could instantiate a KinectAudioSource class directly instead of having to get it from a started KinectSensor, plus the object was disposable so one could place it in "using" clause
  • one could do audioSource.SystemMode = SystemMode.OptibeamArrayOnly (that property doesn’t seem to be available anymore to set)
  • audioSource.BeamAngleChanged was called BeamChanged
  • audioSource.SoundSourceAngleChanged probably didn’t exist (have seen older code use a BackgroundWorker and do polling)
  • audioSource.SoundSourceAngleConfidence was called SoundSourcePositionConfidence
  • audioSource.SoundSourceAngle was called SoundSourcePosition
  • audioSource.BeamAngle and audioSource.SoundSourceAngle (then called SoundSourcePosition) were returning radians instead of degrees (so one usually had to convert to degrees using 180.0 * rad / Math.PI)

I took the chance to cleanup and refactor the original code and XAML and since the original codeplex site just had a single download and not any source code in the repository to fork, I uploaded the whole thing ZIPed under their source code / patches area.

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