the enharmonic properties of the chord of the diminished seventh

• stacking m3
• if we do an inversion and respell A2 as m3 we just get a new fully dim7 chord
• there are really only 12 fully dim7 chords
• resolution
  • fundamental up
  • other tones down
    • tchaik only resolves to minor
• fun thing
  • take the 7th of a fully dim7 chord down a semitone and you now have a dom7 chord
    • 7th now becomes fundamental