Hi T! I'm glad you checked in. Now I can tell you that I've remembered your words about this song and modes and I finally get it! Art's post here helped also.I made midis of Orientis Partibus here, and The Friendly Beasts here. I can finally hear the flatted 7th in the Mixolydian mode of Orientis. Are the two songs about the right tempo? If so I'll send one line midis to Joe. ***Note -- these links will disappear after Christmas. If anyone wants to hear them they can PM me.***