public void TestGetMixdown()
{
Assert.AreEqual(AudioMixdown.Mono, AudioUtility.GetMixdown(1));
Assert.AreEqual(AudioMixdown.Stereo, AudioUtility.GetMixdown(2));
Assert.AreEqual(AudioMixdown.Surround5dot1, AudioUtility.GetMixdown(6));
Assert.AreEqual(AudioMixdown.Surround7dot1, AudioUtility.GetMixdown(8));
Assert.AreEqual(null, AudioUtility.GetMixdown(4));
}