Akai MPC X User Manual page 192

Tap Warp to enable or disable warping of the sample.
When enabled, lengthening or shortening the sample (based on the BPM) will not change its pitch.
When disabled, lengthening or shortening the sample will also change its pitch and vice versa.
Use the Stretch field to set the "stretch factor," which affects how the sample is warped (if Warp is on).
Use the BPM field to enter a tempo, which affects how the sample is warped (if Warp is on).
Tap BPM Sync to enable or disable BPM Sync.
When BPM Sync and Warp are both enabled, the sample's BPM will be "locked" to the tempo of the sequence.
When BPM Sync is disabled but Warp is enabled, the sample will be independent of the tempo of your sequence—use
the Stretch field to lengthen or shorten a sample.
Note: The Warp algorithms are very CPU-intensive and can result in audio drop-outs during playback if used too
freely. Be mindful of how (and how often) you use the warp function. You can reduce the CPU resources required by
doing any/all of the following:
•
Avoid using extreme Stretch values.
•
Minimize the amount of pitch adjustment (e.g., the Semi and Fine parameters) of warped audio.
•
Avoid warping very small track regions.
•
Warp as few tracks or track regions as possible (i.e., reduce the number of total number of voices of the
polyphonic limit that use the Warp algorithm at a given time), especially instances where the warped regions start
at the same time.
•
Avoid rapidly triggering samples that are warped.
• If you have warped samples used in a drum program, consider using the Flatten Pad function to consolidate the
affected pad's layers into one audio sample (see
sample/samples no longer need to be warped.
here to learn about this). After you flatten the pad, its
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