My system was installed yesterday. It consists of Sony 5400 AV Amp, 5000 Blu Ray, B&W speaker package. The amp has a feature called AFD, which enables you to listen in the format that the disc was recorded. The problem was that I was only able to listen to 2.1 surround and not 5.1 channel surround. I checked the back of the disc and it indicates that the disc can be played in both 2.1 and 5.1 surround. I then checked the audio settings on the blu ray and the only option was DTS HD, which I selected. Am I doing something wrong? Can anyone help? In addition, how do I check if the amp or the blu ray is doing the decoding. By the way, I confirmed with another disc that the system is able to play 5.1 surround.