User Manual

Chapter 7: I/O Setup 109
When you create a new output path on the Out-
put page of the IO Setup, a new output bus of
the same width is automatically created and
mapped to that output path. Output busses are
also created and mapped according to default
settings when creating a new session or restor-
ing defaults (see “Restoring Default Paths and
Path Names” on page 103).
Physical outputs for output paths are configured
on the Outputs page of the I/O Setups (see “As-
signing Paths to Hardware I/O” on page 106).
Internal Mix Busses
Pro Tools 9.0 provides up to 256 internal mix
busses and are used to route audio signal from
track outputs and sends to other track inputs
and plug-in side-chains. Common uses for inter-
nal mix busses include effects sends and returns
(such as bussing sends from audio tracks to an
Auxiliary Input track for plug-in effects process-
ing) and bus recording.
Internal mix busses can also be mapped to any
outputs (see “Internal Mix Busses ” on
page 109).
Creating and Mapping Busses to
Outputs
Any available bus can be mapped to any of the
available output paths of the same channel
width or greater. For example, a mono bus can
be mapped to a mono output path, a stereo bus
can be mapped to a stereo output path, and a 5.1
surround bus can be mapped to a 5.1 surround
output path.
You can unmap busses from outputs at any
time.
To create a bus and map it to an output path:
1 On the Bus page of the I/O Setup, click New
Path.
2 In the New Paths dialog, specify the number
of new paths you want to create, the channel
width for each path, and the path name.
3 Click Create to create the new paths.
4 Enable Mapping To Output for the Output path.
5 Select an output path from the Mapping To
Output selector.
Any signals from tracks or sends sent to the bus
are now sent to the hardware outputs assigned
to the corresponding Output paths.
To map all output busses of the same format to an
output path:
 Option-click (Mac) or Alt-click (Windows) any
Mapping To Output selector and select an out-
put path (mono or stereo).
New Paths dialog
Unmapped “MAIN” output bus
Mapping the “MAIN” output bus to output path “A 1–2”