I downloaded the Coyote trial version of software synth (30 day)and it plays satisfactorly with my PC (w7 64 bit)

However as you say Bob it shuts down if I try to combine it with the Tyros 2.

So my preference is to use midi GM to play through the Tyros speakers and perform with the BIAB score at the same time.

This then means the Real Tracks and Drum software is only playable using PC and no midi with Tyros.

No point in me upgrading to later biab versions unless sometime in the future I upgrade my keyboard?