ill try and post a video of what im talking about but ill try and explain a lil better too... lets say i start on Ab Major9 holding ab and eb in my left hand and holding a cm7 in the right taking it down a half step in the left hand and going from the cm7 to a sus4 which would make it a gm7 and repeating the process... so it would be like ab major9, gm7, gb major9, fm7. going down etc...
I got what ur saying. the thing with this is that its a sort of one sided practice, meaning as you go through all twelve keys, the same chords will be the maj9 and the same chords will be the min7, so you have to do a second routine to get the other spectrum. What i mean is if you went from the rightmost side of the keyboard all the way to the left, say you were able to get through 3 octaves chromatically, all your Ab chords would be maj9, all your G chords will be Gmin7, etc, so you'd have to do a second run so you can practice playing the Amin7 and the Gmaj9.
So either include both sets in your practice or do it like this: think of it as a progression, so the AbMaj9 to Gmin7 (doing the same process in the right of going from the Cm7 to C7sus4), then move that progression down a half-step going from Gmaj9 to Gbmin7 (left hand goes from Bm7 to B7sus4) and do this chromatically.
hope this helps
