I think that I found it. On page 19 of the owners manual, it states:
HDMI audio output settings permit the selection of either 2 channels or multi-channels. When selecting MULTI (NORMAL) or MULTI (LPCM), a down-mixed audio signal is only output from the analog connectors (Left/Right and Front Left/Front Right) of the DVD-3910. To output multi-channel sound from the analog audio output connectors, set HDMI to OFF, or select "2CH".
BTW, if you don't have the manual, you can download it direct from Denon at the link
here.
It was the select 2 channel. Something so simple. Just put on Steely Dan. Sounds awsome. Now I can try some more that I bought. My son bought Pink Floyd for Fathers Day. It gave me an excuse to buy the player.
Thanks,
Dean