Chris, that's a bit surprising(assuming that the Oppo rep was correct)since both DPLIIx and Neo:6 make expanding 5.1 to 7.1 a major feature. The receiver manuals typically state that the DPLIIx and Neo:6 modes are for expanding "2-channel" sources to 7.1. Then however, they have separate modes such as Dolby Digital + Neo:6 and DTS + Neo:6 specifically for expanding 5.1 sources to 7.1.

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Enjoy the music, not the equipment.