HI! the only way I was able to send trasport sync start/stop with mpk mini plus is to use the aum app on ipad.
the sync of mpk mini plus set to ext, I set the midi routing in aum in order to send the clock from aum to port 1 and 2 of mpk mini plus and map the start transport button of mpk on the play transport button of aum.
so everything is synchronized at startup from the mpk mini plus, but you have to go through PC or iPad, not standalone as I thought when I just purchased the mpk mini plus.
I also reported this more than a year ago to Akai support. I hope they update the firmware. This keyboard is fantastic but its standalone function is lost if you can only use its master clock without being able to play start with its traspost button.
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