OK, I spent some time on this. I went to the FXM channel, 384, and it was showing Prometheus. It was in DD 5.1 as shown on my Denon AVR and my Denon app on my iPad. I brought up the same movie on FXM On Demand and it shows stereo. So, I looked at 10 movies available On Demand with FXM and they are all stereo. It appears tha FXM is not passing 5.1 on the OD films. Considering other channels are passing 5.1 OD just fine I have to put the ball in FXMs court.