Apple Soundtrack Pro 3 - Manual (Page 513)

PCI Express Audio Interface Cards
Peripheral Connect Interface (PCI) Express interfaces, unlike FireWire and USB interfaces,
require that you install a dedicated sound card in your computer. Of all the audio interfaces,
PCI Express audio interfaces provide the maximum transfer speed and can support many
channels with high sample rates. Many PCI Express audio interface cards come with a
separate breakout box where the audio input and output connectors are located.
PCI Express Audio Interface Card with Built-in Connectors
Some PCI Express audio interface cards have audio connectors attached directly to the
card. Because there is limited space on a PCI Express card to mount audio connectors,
RCA connectors are typically used.
Audio or video device
RCA connector (2)
Computer
(with PCI Express card)
PCI Express Audio Interface Card with Breakout Box
The majority of PCI Express audio interface cards have a breakout box with a large number
of XLR or 1/4" TRS connectors. The breakout box is attached to the PCI Express card via
a long cable with a multipin connector. The long cable allows you to place the breakout
box in a convenient location, so you can easily connect and disconnect your video and
audio devices without going behind your computer.
Breakout box Computer
(with PCI Express card)
XLR connector (2)
Analog or digital VTR
513 Appendix C Working with Professional Video and Audio Equipment