Chewtobacca said:

kk650 said:technically no audio quality loss should have occured along the way from either of the two sources to the final output mix, apart from the downmixing of the dolby digital 5.1 audio of course.

That's true, but it would, of course, be better to use a lossless source. I can help you out with a downmix of the BD audio at some point if you're interested.

If you could downmix the BD audio to stereo and save it to a lossless format like PCM that would be fantastic.

Do you think that the downmixed BD audio would be noticably better than the downmixed dolby digital 5.1 audio though or is the difference likely to be very subtle?