Originally Posted by Piman 
So, are you saying that on most Blu-ray players, I can select what type of sound is output through the optical connection? I can select e.g. DD? And it will automatically convert whatever is on the disc to DD?
Originally Posted by handscombmp I think i've read somewhere that each blu ray has to have a DD track to be output through spdif.
Anyone want to tell me.
All Blu-rays should have a legacy track on them: DTS-HD tracks have a standard DTS core that will play over optical. Many Blu-rays will have a regular Dolby Digital 5.1 track on them, and if not they will have a Dolby True HD track, which also has a regular 5.1 core for playback over optical.