Hey Chas,
Glad to read you are back up and running. Try hooking your Denon DVD player via analog interconnects into the Multi hcannel DVD input. Once you do that, slect DVD on the rEmote control then select the 7.1 button on the remote control. Be sure to move teh toggle switch for bass management all the way up before you do this.
Trust me, this is the best method!
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Outlaw 1070, Anthem MCA5 II amp.
Sony Ps3
Alon 2 Mk2 Loudspeakers
HSU VTF-2 Mk2 sub x2
VAC PA100/100 Tube Amp
ARC SP16-L tube Preamp
Audio Note Dac 2.1 "B" signature
Furutech E-TP80,
Ascend HTM-200, 340C
Sony KDS-55A2020