New Patreon Tier and Early Access Content available. If you would like to support AVForums, we now have a new Patreon Tier which gives you access to selected news, reviews and articles before they are available to the public. Read more.
Stripe is correct - many THX disks vary from disk to disk, but I think the newer ones may have standard video levels encoded now - the Star Wars A New Hope Optimode looks like it has the correct levels encoded, so can be used for setting black and white levels. Otherwise I would also recommend DVE or better still, Peter Finzels disk: