One other thing to check; right click the track and look at Port.

Is the signal getting routed to the expected output?
Maybe it is playing but playing out of the built in sound card while you are listening to an audio interface.
In other words, is that track routed where you want it?

Since you see signal it is playing back *somewhere in my experience.


Make your sound your own!
.. I do not work here, but the benefits are still awesome