The WOW disc does not say what dB FS levels were used on the disc nor what Dialnorm value was used.http://disneydvd.disney.go.com/managed/WOW_Manual.pdf
Speaker Level Adjustment
SPL METER REQUIRED
ADVANCED AUDIO SET Up TOOLS
SPL METER NOT REQUIRED
This test will allow you to adjust the level of each speaker to ensure
that your system is balanced from left to right and from front to
rear. When properly adjusted, the speakers will produce the most
lifelike sonic presentation and allow a soundtrack to be heard as
the producer and recording engineer intended.
The test signal used will be band-limited pink noise. If you have
remote control capability for level adjustment on your system, use
the remote to begin the test, seated in your normal viewing position.
Adjust the individual channels for equal volume at that position.
For best results, use a sound pressure level meter to adjust channel
levels. A comfortable volume is usually between 78 dB and 85 dB
as measured on a Radio Shack or equivalent sound level meter set
for c weighting and slow response.
It is important to keep in mind that music and sound tracks are
dynamic, that is they have loud and soft passages. Properly setting
the levels should allow the loudest passages to have impact without
distorting the sound.
As you set your levels, do not try to set them at maximum volume.