Audio formats questions

[Kilian]

The term "downmixing" (p.11 in the whitepaper) in the usual usage refers to a reduction in the number of channels, say from 5.1 to 2.0 (still remaining lossless in this context), rather than "transcoding" from lossless to lossy (but retaining the same number of channels). The companion DD (5.1) track is to "ensure playback compatibility" (p.6 ).

So if you desire a 2.0 Dolby TrueHD lossless output for some reason, it is possible for the disc to have independent two- and 5.1-channel mixes done by the studio ("due to artistic reasons", p. 11) and the player won't need to do the downmixing from 5.1 to 2.0 on the fly.

Roger Dressler sometimes posts in AVS: you can ask him there.