I just installed my F90BT this week and am pretty happy with it (after fixing the speed warning), but was wondering if anyone had noticed how low the audio volume on a DVD video is compared with other sources? Normal volume for my system is around 10-15, but when watching a DVD it has to be upwards of 40, which creates a little bit of hissing noise. Any way to work around this, or is it just the DVD's themselves?