Manual Inconsistency - Audio Montage - Render Tab - Source Section

Greetings
So the online manual talks about the various options available in the source section drop down list on the Render Tab in the Audio Montage, but makes no mention of the sub sections of “Single Output” and “Multiple Outputs”.
Anyone able to elaborate on this?

Hi Andy,
the manual explains the sub sections of Single Output and Multiple Outputs here: Render Tab