Route software backing tracks into JK?

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What you seek is tricky, but doable – but not advisable in my experience. There is an existing post regarding routing options from the DAW.

Awesome reply, thank you. I spent the extra $$ and got Rogue Amoeba's LoopBack. Works great in a solo test; have yet to try the setup in a real jam. I think the horsepower is there so we'll see! Thanks again for taking the time.