Support and discussion for all of Akai’s modern standalone MPCs including the MPC X / X SE, MPC Live 1, 2 & 3, MPC One / One+, MPC Key 37/61.
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By Lampdog Wed Aug 05, 2026 12:57 pm
On my Key61 I had v3.9, I updated to v3.9.1, reset preferences, and same as before, all of my transport buttons act/react as they should.
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By Lampdog Thu Aug 06, 2026 12:16 am
I'm gonna try that too.

Did you check
MENU
PREFS
SEQUENCER
SOLO BEHAVOR
and/or
REC ARM BEHAVIOR

Does any of this happen when you start from an empty project, load a few drums and try again.