The first US CD reissues retained the encoding, too. Dolby PL or PLII does a decent job with QS; SurroundMaster is even better. A couple of the titles were also originally released on quad reel, and there are conversions floating around out there...Reviving an old thread. If I want to hear the 16 Black Jazz titles in quad, and don't have quad vinyl playback, is the only option the Japanese CDs?
What decoder do I need with an Oppo 205?