finally to illustrate with another example,the use of contrary motion again,and how important the choice of inversions are.
Willie of the Winsbury,the tune starts high and comes down,so I start my harmony line low and work upwards in direct contrast and moving in the opposite direction to my voice.
this accompaniment is not a single line melody accompaniment,but is chordally based.you can get to it through the Bushes And Briars link.
so inversions and the doubling or trebling or quadrupling of notes can give vitally different flavours.
in dadgad,its possible to have a d modal chord,dadaad,or dadddd,something that is very difficult in standard tuning.Dick Miles