If I run the speaker calibration when analogue bypass is selected as the input on my AV30R, I don't get any pink noise output from the left and right front channels, though the other channels work fine. If I select DVD as the input, the calibration works correctly on all channels. Is this a common/known problem, is it a fault on my amp or is there a way to fix the problem? I also occasionally get OVERRANGE (I think that's what it says, it could be OVERFLOW or OVERLOAD) displayed - is there a way of finding out whether this is an input overload, an internal calculation overlflow or an output overload. It may be due to ressignment of the subwoofer signal as I don't have a subwoofer at present. Any help appreciated. Thanks, Mike B.