Lately I've been experimenting a lot with inverting melodies, and I have a question. Let's say I have a simple melody in a A minor And I invert that melody note for note holding the A as the edge of the melody, in other words the flipping point, the note that doesn't change... Does that mean that the tonic of the inversion of the melody in A minor is the major sub-dominant? I've noticed that if I have an A minor triad, and I invert it using the A as the center, the chord becomes a D major... I imagine this is always then in terms of all tonal melodies, correct?