In the rare occasions where I need different processing on the channels of an (e.g.) 5.1 Group (or Output), I use mono or stereo inserts in the Groups’ (or Outputs’) Plugin Slots and route them accordingly with the “Insert Routing”-options in the Channel Settings Window (the “e”-window).
You can capture the audio of this processed 5.1 group (or output) by routing this group (or output) as the input of an 5.1 (?) track and print it in real time.
If you need the channels separated (=split) , I’d say you select your events and then use AUDIO/ SPLIT CHANNELS / EXTRACT ALL CHANNELS/ ADD SPLIT FILES TO POOL ONLY.
You’ll find your 6 5.1-files in the Pool…
Hope this helps?
Niek/ Amsterdam.