Akai MPC TOUCH User Manual page 148

If you set the Assign To field to Make new sample, this will create a
new sample in your project. (The original sample will remain as it is.)
Use the Pad field to select the desired pad. Alternatively, press the
desired pad.
Check the Crop Sample box to delete the unused parts from the
sample when it's created and assigned. This feature is destructive,
though the project will still contain your original sample.
Leave this box unchecked to keep the unused parts of the sample
when it is created and assigned. This way, you will still be able to
edit the entire sample further even though you are using only part of
it at the moment.
Use the Program field to specify the program to which you want to
add the slice.
To assign the sample, tap Do It.
To cancel the operation, tap Close.
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