(Designed for Safari. Use the link above in Firefox/Chrome,it may allow a QuickTimePlayer to take over, as Firefox/Chrome will otherwise not provide 4 channel sound.)
The Safari, Firefox and Chrome may indicate that you need a plugin, but if the file is playing you do not. In Chrome or Firefox, stop the playing file (which will most probably only be stereo), and try to use the link above, which will probably give multichannel sound.
Looks like your browser does not support HTML 5 with aac/mp4 encoding. We have provided alternative code for IE users. We recommend Safari.