# What's the best exercise to master 2-5-1 or cycle of 5ths on a chromatic accordion (B-system)

When I started learning jazz on the piano, I was shown a very good exercice to learn voicings in all scales. It started Am7-D7-G7M-C7M-F#dim-B7-Em7-Bb, then it went on the same from Bbm7-Eb7-... It was pretty hard to get it all right, but in the end it got to teach you good voicings for every single 2-5-1.

Is there something similar for the chromatic accordion? (ideally with fingering for B-system)

• I'm not sure what you're asking for--are you talking about the Omnibus Progression or something similar to that scale? [see: en.wikipedia.org/wiki/Omnibus_progression ] As for exercise, are you talking about improvising, sight-reading, or playing the Chromatic Accordi? – Goodwin Lu Jul 12 '16 at 15:59
• Let's say I am comping on Autumn Leaves on the piano. I am not going to play the basic form of each chord, i.e. Am7=A-C-E-G then D7=D-F#-A-C , instead I am going to play some chords in an inverted fashion, and always trying to avoid moving any fingers that are common to 2 chords that follow each other. So for instance here A and C are common to the 2 first chord so I will try to leave my fingers on the notes and only move the other fingers. This makes the chord accompaniment much more smooth than if I was playing each chord in its non inverted way. – joelhoro Jul 14 '16 at 10:11
• You mean on the right hand, I assume. The way I was taught was to start with just using the bottom three rows and then there are three patterns. One starting on the first row for key of C, Eb, F#, A second row for C#, E, G, Bb third row for D, F, G#, B. – MikeiLL Aug 22 '16 at 3:58