Yamaha DTXpress/DTXplorer/DTXtreme

> I cannot see how you could get 3 sounds from two piezos (at least not
> with a Yamaha module) although I am prepared to be proven wrong!
> 
> Keith.

My theory was that the module would sense when the head and rim are
hit simultaneously, and play back a rim shot sound. I guess not.

Anyway, I am able to get all the sounds on the snare input by tapping
the trigger shell. Rim shot with a lighter tap, and a rim click with a
harder tap. It's just that the sensitivity is way too low (even with
the gain maxed out) to get it to sound when hitting the actual rim of
the drum. You don't suppose a simple amplifier of some sort could work?

The DTXpander diagram looks a bit puzzling to me, but I haven't had
the time to seriously look into it yet.