How to start recording output (audio) at multiple locations

I am trying to record audio at multiple locations in UE4.

Basically, I am using Steam Audio plugin for physics based sound propagation and I am trying to simulate a microphone array.

I have already experimented with “Start Recording Output” which records the master output.

I would like to to set up four nodes and “Start Recording Output” at those four nodes.

So how can I specify the location of the “microphone” at which audio is being heard?