Closed Issue: Can't close app in Unity3D [16372]

When using in Unity3d, I can not close app.
In Unity3D editor, it does work.

Test sample can be downloaded from below.
https://skydrive.live.com/redir?resid=A75A74307455C939!117&authkey=!ALwBE-R92Qc6x6k

Comments: the issue was function callbacks. Fix is to use WaveOutEvent instead