Specifications

Pro Tools Reference Guide114
Sub-Paths Follow Main Paths
When a main path is reassigned, its sub-paths (if
any) are reassigned automatically to maintain con-
sistent routing. For example, reassigning a stereo
path to different hardware outputs results in any of
its sub-paths moving with it.
Valid Paths and
Requirements
While configuring the I/O Setup, certain rules ap-
ply for path definition and channel assignment. All
paths must be valid before the I/O Setup configu-
ration can be applied.
Though it is possible to set up invalid assignments
in the Channel Grid, Pro Tools will not accept an
I/O Setup configuration unless all paths meet the
path definition and channel assignment require-
ments, as follows:
Minimum Path Definitions All paths must have a
name, be of a specific format, and have a valid I/O
assignment.
Valid Paths Channel assignment follows certain
rules regarding overlapping paths.
• There can be no partial overlaps between any
two output paths.
• A newly-created output path must either be
completely independent of other assignments
(not assigned to any other available I/O inter-
face/channels), or it must be a path completely
contained within a larger path (for example, an
LCR sub-path within a larger 5.1 path).
Configuring Busses
Busses appear on the Bus page of the IO Setup.
Pro Tools provides two types of busses:
• Output busses
• Internal mix busses
Output bus and internal mix bus settings are saved
with and recalled from the session. The advantage
of this is that when you take a session from one
system to another, track and send assignments are
maintained within the session. Where possible,
Pro Tools can automatically remap the session’s
output busses to the output paths of the system the
session is being opened on.
Valid (complete) output path
Invalid (partial) output path
See “Session Interchange” on page 120 for
more information exchanging sessions be-
tween systems, and on opening sessions in
lower version of Pro Tools. Output busses do
not exist in Pro Tools 8.0.x and lower.