A Pro Logic decoder is not what you need here. You really need an SQ decoder instead as DPL is LCRS, which is a variant of SQ but not the same.
Best approach is to get a copy of Adobe Audition and a copy of the wonderful Lucanu script, or Kempfands one for QS.
Separation is awesome.
Usage is to record the stereo SQ matrix into your PC, and then follow directions in the script files.
Actually, the best thing I can see doing is to make a CD of the album, and then use your own SQ decoder to play it..
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