Mixing : Basic Mixing : Delay Compensation

Delay Compensation
For more information, see the following topics:
Pro Tools provides automatic Delay Compensation for managing DSP and host-based delays from plug-in inserts, and mixer routing (bussing and sends). With Delay Compensation enabled, Pro Tools maintains phase coherent time alignment between tracks that have plug-ins with differing delays, tracks with different mixing paths, tracks that are split off and recombined within the mixer, and tracks with hardware inserts.
To maintain phase coherent time alignment, Delay Compensation should always be enabled during playback and mixing. Delay Compensation should also be used in most recording situations.