Apple Soundtrack Pro 3 - Manual (Page 527)

Professional VTRs, camcorders, audio devices, and interfaces often have the ability to
accept sync signals from an external device. These connectors are labeled “genlock” (short
for generator lock), “external sync,” “reference input,” or “reference video.” On some
equipment, the normal composite video input of a device can be used to lock to external
sync.
Important: To synchronize your video or audio devices and interfaces, they must all
accept an external clock source (such as a blackburst generator).
When you genlock a deck and a video or audio capture interface, one output of the
blackburst generator should be connected to the external sync input of the video or
audio deck, and another output should be connected to the external sync input of your
audio interface.
Analog or digital VTR
Video
Reference video Reference video
Audio
Blackburst
generator
Breakout box Computer
(with PCI Express card)
To connect your audio deck outputs to a third-party audio interface for synchronized,
genlocked audio capture
1 Install a supported audio interface card in your computer, or connect a supported audio
interface.
For more information, see the documentation that came with the audio interface and
your computer.
2 If you are using a PCI Express card audio interface that came with a breakout box, connect
the breakout box to the PCI Express card using the included cable.
3 Connect the audio outputs of your audio device to the audio inputs of your audio interface.
4 Connect the remote device control cable.
5 To genlock your audio deck to your audio or video interface:
a Connect one of the blackburst generator’s outputs (there should be several) to the
genlock or external sync input on your audio deck.
b Connect another of the blackburst generator’s outputs to the genlock or external sync
connector on your video or audio capture interface (depending on which one you are
using to capture audio).
For more information, see Synchronizing Equipment with a Blackburst Generator .
527 Appendix C Working with Professional Video and Audio Equipment