![]() With a frame edge reference, Pro Tools can align audio playback to video output refresh with near sample accuracy. To bring everything into line, devices can use a common frame edge reference, which tells the video player when to display each frame, letting Pro Tools align audio with near sample accuracy. ![]() Without a common video reference, video frames cannot be displayed exactly in line with your Pro Tools timecode position. This will be different each time you start playback. But when synchronizing sound with video, there's one more thing to know: when exactly does each new frame of picture get displayed? Without knowing this, Pro Tools and your video output device will be locked to the same timecode position and clock speed, but video refresh could be offset by up to a frame. So, our two key sync data points are position ("Where are we?") and clock ("How fast are we going?"). ![]() Sync X gives your Pro Tools system the ability to follow or generate timecode (as LTC or MTC) and many flavors of clock such as Word Clock, Video Reference, 10 MHz, and Bi-phase. Playback speed is locked across your system using a clock reference, which prevents playback drift and digital audio clicks. Timeline position, or positional reference, is communicated with timecode, making sure Pro Tools and external devices start at the same place. To recap some first principles, there are two things that can be synchronized between your devices-position and speed. It also enables Pro Tools to precisely align audio playback with video output. ![]() That could be external video reference generators, video playback devices, specialty master clocks, digital mixers, MIDI workstations, and, of course, other Pro Tools systems and DAWs. Like SYNC HD, Sync X lets you synchronize Pro Tools | HD systems with just about any kind of audio or video hardware. As an audio specialist at Avid, I often help studios and suppliers configure new Pro Tools systems, and a common question I hear is, "What do I need a Sync peripheral for?" Pro Tools | Sync X is the successor to Avid's Pro Tools | SYNC HD synchronization interface. ![]()
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