Sorry, the scales got messed up. It seems that the news group cannot display the 'b' sign for flat notes.
So let me try again:
natural minor (the commonly used scale)
1 2 b3 4 5 b6 b7 8 (e.g.: a b c d e f g a)
melodic minor (as used by A-156):
1 2 b3 4 5 6 7 8 (e.g.: a b c d e f# g# a).
I would like to let the A-156 be modified such that it produces the first of the scales indicated above - who else is interested