This concerns the Melodic Minor. Now let me say first that I am thrilled that the new scales were put in, particularly Harmonic Minor. However it seems that the Melodic Minor is not setting the harmony note correctly for a higher third harmony for one note on that scale.
Let me express myself by example, in the key of C Melodic Minor. For the Bb note (descending), a third is harmonized in the Pitchfactor with C# (or Db, however you want to look at it), i.e. as a minor third above Bb. But Bb is not even in the Melodic Minor scale! I would think that a major third would be appropriate as the higher third harmony note here, i.e. using D.
Perhaps for centuries this is how that note has been harmonized, using a note outside the actual scale, perhaps I am ignorant of that fact, and someone will enlighten me. However I doubt it, I think this is probably a glitch.
C, D, E-flat, F, G, A, B, C (ascending)
C, B-flat, A-flat, G, F, E-flat, D, C (descending)
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