What it sounds like is that the 1050 is recognizing a dolby digital data stream (hence the "DD" indicator) that is only Dolby 2.0, and since you are in surround mode it uses Pro Logic for surround processing. If you switch to stereo instead of surround, you will likely find the "DD" indicator still lit, but the Pro Logic indicator off. The "DD" indicator purely indicates that the signal is encoded in Dolby Digital, and it could be Dolby 1.0, 2.0, 4.0, 4.1, 5.0, 5.1, or whatever. Also, if the 1050 is in surround mode and it has a stereo input (analog stereo, stereo PCM from a CD, or Dolby 2.0), it will apply Pro Logic because that's the only method it has for surround processing at that point -- and if it's something other than Dolby Digital, the DD indicator will not be on. The signal may not be encoded specifically for Pro Logic, but the 1050 will still do its best.

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