Blu-Ray Audio no secondary track/commentary

I suggest giving these steps a shot and let us know how it goes:

1. Disable the 24 Hz setting in Disc and Blu-ray settings menu. For steps to do that, check out our
   
   Disc and Blu-ray settings support article.
2. If you're still having issues, it might be the result of TV processing. Try disabling any motion/smoothing processing on your TV.
   

Maybe it's the Blu Ray only providing DTS in 5.1 Are the provided audio formats listed on the Blu Ray?

No, Blu-ray and HD are not the same. Blu-ray is the media format. Not all content on Blu-ray is HD. Anyway, wondering more of the actual specs, like bit rate, fps, and streaming format for both audio and video.

The plot thickens... just tried a music Blu-ray and the audio was no where near as delayed as it is everywhere else... what is that about? Does that mean the pic is also delayed by about the same amount as my audio randomly on Blu-ray?

here is my 10 cents on the matter.

Most Blu rays movies have multiple audio tracks; one being the compressed lossless audio track and the uncompressed audio track but the difference between them two is the resolution. I have seen some uncompressed audio be 16bit and then see compressed
lossless audio be 24bit or even 36bit. Which if you listen to both you do hear a difference.

I like to see this changed as well (nothing beats visually seeing what your really hearing), but you could make sure that before playing your movie have it select the compressed lossless audio track before playing the movie. This will ensure that xbox
decoding the right track.