How to sequence chord type externally?

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I tried this and it seems that external sequencing of chord types with CC 27 only "prepares" the new type (showing it in a blue fond on the screen) for the next chord change, so combining CC 27 with CC26 or a Midi note does not lead to the wanted chord result. Is this so? And is there a way to directly control the chord degree and type at the same time from an external Midi sequencer?