If it happens again, open the Mixer and look at 2 sliders.

One is labeled A1 in the bottom right section. Push it up, have a good signal going out here.
The other lies between the Tracks side of the Mixer and the AUX/MainOut side, It's a lonely slider, out there on it's own, I think it's even unlabeled.
Not sure why it is there, but it does affect the output.


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