Route software backing tracks into JK?

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Hi, New to JK as of today. Searched forum, but nothing answers this question:

I know backing tracks can be added from files into JK as tracks in a session; but I'm looking for a more direct approach. I'd like to have multiple audio sources into JK:

e.g., Take the signal out of backing tracks apps like "Band in a Box" (BIAB) or iReal Pro, and send that as an input track to JK
...as well as take the incoming piano and vocal mic from the audio interface as input tracks into the same JK session. 


Maybe Loopback by Rogue Amoeba or something similar might be able to do that? Maybe one way to do it would be make a virtual audio device:

inputs: signals from BIAB as well as the hardware audio interface. 
outputs: the output of the virtual audio device would be sent to JK.


Any thoughts?

Thanks,