Akai MPC TOUCH User Manual page 151

Extract
This process deletes the regions before the start point and after
the end point and saves it as a new sample (with a name you
enter) in your current project.
Tip: This is useful if you recorded a drum loop and wanted to
remove just a snare drum hit, a kick drum hit, etc. to use
separately in the project.
Normalize
This process increases a sample's level to the highest level
possible without distortion. This is essentially a kind of digital gain
optimization, so you do not have to worry about excessive level
settings when working with samples with a wide range of
amplitudes.
Reverse
This process reverses the region between the start point and end
point.
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