Pro Tools Concepts For more information, see the following topics: Hard Disk Audio Recording Pro Tools Nonlinear Editing DAE Core Audio ASIO MIDI Synchronization Surround Sound Pro Tools Sessions Tick-Based and Sample‑Based Time System Resources DigiBase AAF, MXF, and OMF Embedded Media and Linked Media Before you begin to use Pro Tools, you may find it helpful to review Pro Tools concepts. These concepts are the foundation of Pro Tools operation and functionality.