public static extern Error iplCreateListener(string hrtfFileName, ListenerSettings settings);
public static extern Error iplUnity5InitializePhonon3D(int samplingRate, int frameSize, string hrtfFile, ListenerSettings listenerSettings);
public static extern void iplFMODInitialize(string hrtfFileName, ListenerSettings settings);
public static extern Error iplCreate3DContext(uint samplingRate, uint frameSize, uint numChannels, string hrtfFile, ListenerSettings listenerSettings, [In, Out] ref IntPtr context);