Pro Tools LE lets you lock up to SMPTE Time Code at any frame rate by using MIDI Time Code (MTC). This is a common method used to trigger a DAW system to start record or playback at a specific time code location. You can use any SMPTE to MTC converter (included in many common multi-port MIDI interfaces). Pro Tools LE and Resolving to Time CodeFor most home studio recordists, running a simple "trigger to time code" system gets the job done. It's pretty expensive to supply a system that truly "resolves" the DAW to another clock source. Some cheaper DAWs perform this task in SW, but this means the system must perform real time sample rate conversion, which seriously degrades audio quality. If you care about your audio "let's not go there." Trigger Lock? It Works Just Fine For Many Applications...Luckily, when working with video decks and digital tape transports (like DATs or MDMs, like ADATs), you generally won't have any problem locking for relatively long periods of time even if you're not running a truly "resolved" system. You can just trigger to MTC, and things stay in sync for a pretty darn long time.