Akai MPC X User Manual page 166

The Time Stretch process lengthens or shortens the
sample without changing its pitch. This is useful for
matching the durations of two samples with different
pitches. You can enter the original tempo of the sample
and the desired tempo after processing.
Use the Beat field to set the desired value number of
beats.
Use the New Tempo field to set the new tempo. The
Ratio field will then automatically show the time
stretch factor.
Alternatively, to adjust the ratio instead, use the Ratio
field to set the desired ratio. The New Tempo fieldwill
then change automatically based on the new time
stretch factor.
The Gain Change process raises or lowers the volume of
the sample. You can adjust it up to 18 dB, higher or lower.
This function is different than Normalize because it will
allow volumes beyond clipping level. This may be a
desired effect, but remember to watch your output level!
The Copy process saves a copy of the sample.
Use the Edit Name field (and the virtual keyboard that
appears) to name the new sample. Otherwise, the
process will add a consecutive number after the sample
name.
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