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I have a denon AVR2307 (not the CI version) ; a PS3 connected using an HDMI cable and a DVD player also connected using an HDMI cable. no optical or digital cables used for audio.

when I set the channel levels, everything is fine when watching for example the PS3. but when I switched to the DVD player, all the channel levels changed by themselves.

when I fixed them again, I set the lock settings.

so after watching the DVD player, I switch back to the PS3 to find out all the channel levels have changed again.

any ideas on what's going on?