Akai MPCX User Manual page 148

In Next Sequence Mode, every pad is assigned to a sequence,
starting from Pad A01 with Sequence 1 and ascending from there.
The pads will show the names of their corresponding sequences.
Empty pads correspond to unused sequences. The currently
selected pad will flash green.
During playback, change the next sequence that will play by
pressing the corresponding pad or tapping it in the touchscreen. If
you do not select another sequence, the current sequence will
repeat indefinitely.
As a sequence plays, you can use the buttons at the bottom of the touchscreen to change how playback works:
To switch to the currently selected sequence at the beginning of the next bar, tap Next Bar. This is useful if
you want to switch to another sequence before the current one ends without having to worry about timing issues.
To switch to the currently selected sequence immediately, tap Sudden. The new sequence will start playing
whether or not the current sequence is done. This is useful in live performances if you need to switch to the next
sequence instantly at a certain cue.
To delete the currently selected sequence from the sequence playlist, tap Clear. This option is available only
if that sequence is not playing at that moment.
To repeat the current sequence indefinitely and temporarily ignore pad presses, tap Hold. To return to
normal operation, tap it again. This is useful if you want to select other pads without selecting them to play next.
To copy the sequence playlist to a song, tap  Song while playback is stopped.
In the Copy to Song screen that appears, select a song, and then tap Do It to continue or Close to cancel.
To read more about Song Mode, please see the Song Mode chapter.
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