Yamaha DTXpress/DTXplorer/DTXtreme

It's true what you said about guitarists. I installed a placebo volume knob 
on our guitarists amp, without his knowlwdge of course, it worked wonders. 
Everbody is happy.
In regards to the snare and high-hat double triggers, volume variations and 
no sound, I have had this problem only when playing with my band in practice 
and at gigs. I'm not a banger, never broken a cymbal or stick in thirty 
years.I have also worn headphones and still experienced the same problems. 
There is something going on when playing with other electronic 
instruments...perry