Can anyone point me to a test stream that is known and proven to contain actual 5.1 Dolby Digital audio? I am not a Netflix subscriber and the test streams I have been able to find on YouTube and elsewhere that claim to be 5.1 keep turning out to be 2-channel stereo. This is greatly complicating my attempts to get surround sound working on my streaming pc. I need a stream (not a download file) that actually contains AC-3 multi-channel audio.