Hardware outputs are the physical outputs on your audio interface or any other device
you connect your audio output busses to, such as the audio outputs of a DV deck.
Final Cut Pro supports up to 24 hardware audio outputs.
By default, Final Cut Pro uses the audio output device in the currently selected Easy
Setup. If you need more audio output channels or higher-quality outputs, you can
connect a third-party audio interface to your computer. For more information about
audio interfaces, see Volume 1, Chapter 12, “Connecting Professional Video and Audio
Equipment.” For information about choosing an audio output device for Final Cut Pro,
Configuring Audio Outputs
” on page 37.