public XtMix GetMix()
{
IntPtr mix;
XtNative.HandleError(XtNative.XtDeviceGetMix(d, out mix));
XtMix result = mix == IntPtr.Zero ? null : (XtMix)Marshal.PtrToStructure(mix, typeof(XtMix));
XtNative.XtAudioFree(mix);
return(result);
}