Output Bus Configuration
Before you can start working with surround sound, you must configure a surround output bus through which all the speaker channels of the selected surround format are routed.

Figure: Output bus in 5.1 channel configuration
Nuendo 10.3.0
Before you can start working with surround sound, you must configure a surround output bus through which all the speaker channels of the selected surround format are routed.
Figure: Output bus in 5.1 channel configuration