Processing : Elastic Audio : Warping Audio : Out of Range Processing

Out of Range Processing
Pro Tools lets you apply extreme amounts of Elastic Audio processing. However, at such extremes, it is possible to go out of the selected Elastic Audio plug-in’s processing range. When this happens, it is possible that not every sample will be processed correctly and you may encounter audio drop outs.
The valid range for Elastic Audio TCE processing is 1/4x to 4x for all Elastic Audio plug-ins except X-Form, which supports 1/8x to 8x. TCE less than or greater than these ranges is effectively “out of range.”
When out of range processing occurs, the section of the audio clip that is out of range turns red. You can still apply Elastic Audio processing, but you are warned by the color change that the TCE factor is out of the normal range of Elastic Audio processing.
 
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The TCE Factor in the Elastic Properties window supports extreme ranges from 1–9999%. However anything outside of 25–400% will be “out-of-range” and will be displayed in red.