Multiple instances of SWYH

This are actually multiple questions:

I have 4 audio applications running on a pc with 7.1 soundcard. They output to different channels of the soundcard (FRONT, BACK…).
I want to stream all of them to different ports at the same time.

  1. What channel does SWYH listen to and can I select this somewhere?
  2. Can I run mutliple instances on different ports?