Deliver>Audio>Discrete audio tracks ?? What is this?

I'm having some issues while exporting audio, and I'm checking the deliver audio options.

i've seen this checkbox "Render as discrete audio tracks" and I've search on the manual, but nothing appears there explaining for what is this checkbox.

Does anybody have a clue?

Video with Audio Export
Render one track per channel:
each channel in a Buss will be rendered as a dedicated mono audio stream.
e.g. single SMPTE 5.1 Buss designated as an Output Track will produce 6 mono audio streams to accompany the single video stream within the deliverable.

Render as discrete audio tracks:
each Output Track or Buss will be rendered as a dedicated multichannel audio stream.
e.g. two SMPTE 5.1 Busses will produce two audio streams of six channels each to accompany the single video stream within the deliverable.


Audio Only Export
Render one track per channel:
each channel in a Buss will be rendered as a dedicated audio file.
e.g. single SMPTE 5.1 Buss designated as an Output Track will produce 6 mono audio files.

Render as discrete audio tracks:
each Output Track or Buss will be rendered as a dedicated audio file.
e.g. two SMPTE 5.1 Busses will produce two interleaved audio files containing 6 channels each.

What are the issues you're having? You never said.