What device is used to synchronize a tape source to ensure all cameras and recorders capture frames simultaneously?

The time-base corrector is crucial in synchronizing a tape source, ensuring that all cameras and recorders capture frames simultaneously. This device helps to eliminate timing errors that can occur during the recording process. By stabilizing and correcting the timing of the video signals, the time-base corrector ensures that frames from multiple sources align perfectly, which is vital for maintaining audiovisual coherence during editing and playback. This synchronization is especially important in multi-camera productions, where any misalignment can lead to noticeable discrepancies in the final output.

In contrast, the other devices listed serve different functions: a video switcher is used for selecting between different video sources, a frame counter helps in tracking the number of frames but does not synchronize devices, and a digital mixer is primarily focused on audio mixing rather than video synchronization. These distinctions highlight why the time-base corrector is essential for this specific task.