The TCE Factor property in the Elastic Properties window displays the percentage of change applied to the source file. On tick-based tracks, this property is display only and cannot be edited. On sample-based tracks, you can change the TCE Factor to apply TCE to the clip. The percentage of the TCE factor is always calculated in relation to the source file. The TCE Factor value turns red when Elastic Audio processes exceeds the valid range (see Out of Range Processing).