Akai MPC X User Manual page 210

The third Samples tab contains the control for its offset.
Use the Offset slider to determine a time offset for the sample's playback.
Positive values (right of center): When the pad is played, playback will start immediately but at a later point in
the sample specified by the offset value.
Negative values (left of center): When the pad is played, playback will be delayed by the amount specified by
the offset value.
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