everyday piano practice.

1-5-1.

6th chord change barry harris method.

secondary dominant.

7th AXIS180=6th change and 9th.

root change to half note up diminish chord and 5th to half note up=half up m6.

bass root and 5th no change.

m7=1357

△7＝9357

change 6th chords play any key, all chords 1 type chords of minor chords,m6,m7,m7b5 chord.

m7=m7+M7

m6=7th chords

m7b5=m7b5