Depending on the I/O Setup page, the I/O Setup provides the following controls in its graphical section for configuring signal routing paths.
Let you select the physical ports on your audio interface to route to Pro Tools inputs and outputs. Ports are selectable in channel pairs. Available ports for each displayed interface are based on Hardware Setup settings; for example, if the AES/EBU inputs and outputs of an interface are enabled in Hardware Setup, they are available for routing in I/O Setup. The functionality provided with the Input and Output selector is the same as that provided on the Main page of the Hardware Setup.
Shows paths that are available for selection, including the name of each defined path. Path names can be renamed.
Shows or hides the sub-paths associated with a main path (Input and Bus paths only).
Shows and changes the active/inactive status of each path.
Shows and selects the type/format (such as Mono, Stereo, Quad, or 5.1) of each defined path (greater-than-stereo multichannel formats are supported with Pro Tools HD and Pro Tools with Complete Production Toolkit only).