Akai MPC X User Manual page 140

Tap the track automation button or press Read/Write (MPC X) to cycle
through its three states:
When off, the audio track will ignore automation data. If you have already
recorded or entered automation, tapping this will switch between Read (R)
and Write (W) only, but you can override this and turn it off by pressing and
holding Shift while pressing or tapping the button.
Important: If you have already recorded automation and turn it off, the
track will still use the effect and its parameter values at the point where you
turned it off.
When set to Read (R), the audio track will read automation data but will not
record any additional automation over it. (Think of this as a protective
feature to prevent accidental changes to your automation while recording.)
When set to Write (W), the audio track can record automation. (If you have
any Q-Link knobs assigned to automatable parameters, make sure not to
touch any accidentally while you are recording.)
Tip: You can quickly set all programs and audio tracks to the same
automation by tapping the global automation button in the upper-right corner
of the screen. See
To change the panning or level of the track, adjust the pan knob or level
slider.
To record-enable the track, tap the Record Arm button or press Rec Arm
(on MPC X when the track name is shown in the display strip below the level
meters). When you begin audio recording, the audio signal will be recorded to
this track.
Tip: You can select multiple tracks in the Track View by pressing and holding
Shift while tapping the Arm button to each track.
When viewing the master channel strip:
The first field shows the current master output as a stereo pair (which you can
change).
The Inserts field shows any enabled or disabled effects for that pair of outputs.
Tap the area under Inserts to open a window where you can load, change, and
enable or disable the effects.
Tap Mute to mute the master output.
Adjust the pan knob or level slider to change the panning or level of the
master output.
General Features > Automation to learn about this.
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