Akai MPC X User Manual page 246

The second Samples tab contains controls for its pitch, volume level and panning.
Semi lets you transpose the selected layer 36 up to semitones up or down. This will affect the length of the sample (if
Warp is off). This is the same as the Semi field on the first Samples tab.
Fine provides fine-tuning of each layer by cents. This will affect the length of the sample (if Warp is off). This is the
same as the Fine field on the first Samples tab.
Level lets you adjust each layer's volume, letting you control the "balance" of the samples assigned to the pad.
Pan lets you adjust the stereo placement of the respective layer.
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