Model is DTX III SP, I guess my fiddling is responsible!
The first time I managed to silence the snare, when hit the display
indicated it was hit OK but no sound. Reset fixed it.
The second time I was unable to vary the accompaniment volume, it was
stuck adjustin the snare volume (almost like the "shift" button was
stuck). Again a reset fixed.
I guess as I get to know it better I'll cause less problems.
Steve