Sub-paths let you route to selective channels within the multichannel surround output. In the following figure, the Mix 5.1 bus has several sub-paths that show this.
The 5.0 path is a 5-channel sub-path. Use this type of sub-path routing to conserve mixing resources with tracks you want to keep out of the LFE channel.
A custom LFE sub-path (“Lf”) has been added to provide a discrete mono path for the LFE channel.