I just got the AVR300 and the sound is amazing. The only problem is when I have it hooked up to a Scientific Atlanta 8000 HD DVR box, there is sometimes a random high pitched crackle. This crackle is more likely to happen if I am forwarding through a saved show. The thing is everytime it happens, The mode switches to DD Logic IIx for half a second and then switches back to DD 5.1. I have firmware revision 3.08/ DSP 1.12. I have tried both coaxial digital and toslink. I also have an Airport Express hooked up via optical and a PS2 hooked up via optical, and never have any problem with those. Is there any way to disable DD Logic IIx? I only have a a pair of fronts hooked up so I have no need for it, but I do need digital audio support. Will it be better to completely forgo digital and hook up via analog? I also use HQ video (component) switching, but that probably makes no difference. Will upgrading to the lastes firmware have any impact?