all chord has minor chord.
Every day practice memory minor 7th chord.
6th change is 7th half note down.
○harmony method.
bass down is up inversion chords.
bass up is down inversion chords.
move image
bs← →chord
bs→ ←chord
NG harmony method move restriction.
parallel 5 and 8 movement.
bs→ →chord
bs← ←chord
but move restriction than priority on hold note.
