If you are using an optical Toslink cable instead of HDMI, note that optical cannot carry uncompressed Dolby TrueHD or DTS-HD Master Audio. It maxes out at standard Dolby Digital 5.1. Make sure your downloaded file is encoded in standard AC-3 Dolby Digital.
Are you experiencing a like missing dialogue or no sound from the rear speakers?
Look at the physical front panel of your home theatre receiver when the video starts playing. It should explicitly display "AC-3," or "DD 5.1." If it says "Stereo," "Pro Logic," or "PCM," your system is downmixing the audio to two channels. What to Listen for During the Test Test Phase Expected Outcome Troubleshooting Tip Center Channel Call Dialogue comes directly from the screen center. If it sounds muffled, increase the center channel dB level. Left/Right Panning Sound moves fluidly from left to right.
: Features a collection from the original Dolby Digital, DTS, and THX Surround Demonstration DVD available in MP4 format.
Play the channel-check video. Listen closely as a voice or tone identifies each speaker: "Front Left," "Center," "Front Right," "Surround Right," "Surround Left," and "Subwoofer."
