So, for the Gospel at least, the tone indicated in the tutorial (PDF, over on the MusicaSacra audio tab) differs a bit from the one I see printed in the Roman Missal. In particular, the response at the end ("Praise to you, Lord Jesus Christ") is a bit more ornate in the tutorial, but is simpler in the Missal, using only do and la.

The author of the tutorial (Adam Thome -- and that tutorial is really cool, by the way) acknowledges that there are actually a few differing formulas for the Gospel tone. I guess I'm curious if any one of them is more definitive than the others.