Matt,
Thanks again for taking the time to answer me, it is highly appreciated!!!!!

The Realtracks and RealDrums correctly pointed to and in the mixer window I can see all the sounds being played back correctly and a normal sound level. So the audio mixer levels are OK, also the speakers are at 80%, so I should be able to hear the non-MIDI sounds from my speakers, but I don’t.

As a test I have connected the SD-50 to one of my other (WIN 7) laptops, after installing the SD-50 WIN 7 driver and there it worked perfectly!!!!!
So perhaps it is something outside of BB, like e.g. the WIN 10 driver for the SD-50?

If you have no other suggestions, I will ctc. BB support, but I had thought somebody else might have run into the same problem and thereby killing two birds with one stone.

Brgds,
Tonnie