Apple Final Cut Pro 7 - Manual (Page 206)

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.
Computer
(PCI card with
connectors)
Audio or video device
RCA connector (2)
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 card)
Analog or digital VTR
XLR connector (2)
Audio Connectors and Signal Formats
You can use a variety of analog and digital audio connection options and signal formats.
Analog Audio Connectors and Signal Formats
Different audio connectors are suited for different purposes. Audio connectors are often
indicative of the kind of signal they transmit. However, there are enough exceptions that
it’s important to know what kind of audio signal you are connecting, in addition to the
connector type. An important distinction is whether an audio connector carries a balanced
or an unbalanced signal.
206 Chapter 12 Connecting Professional Video and Audio Equipment