Trying to export a live concert. Sony wants 8 channels of audio married to my quicktime. I have my timeline setup so that channels 1-6 are the 5.1 mix and 7 and 8 are my stereo mix. When I look at my mixer, it shows all the channels giving me levels. My output is set to 8 channels. My timeline has 8 channels (see screenshot), my export says 8 channels with uncompressed audio. My resulting quicktime has 8 channels of audio except... channels 7 and 8 are silent! Help!