Ok so the only way to link the sub to the sound bar is through the tv menu. Got it done. But the premise of a sub that physically comes with the sound bar that you have to so through such extraordinary measures to get them to play together is silly. I still stand by the concept of them coming out of the box linked or via the songpal app like you would add another speaker is how it should be designed in the future.
Another separate comment on the sound bar. Why can't Sony TVs have a power outlet for the sound bar? This would be great if I could have readily available power for my sound bar. Oh, but no. I have to run AC power across my fireplace to get power to the sound bar that is directly under my Sony TV!