Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "jtatsuoka" <jtatsuoka@y...> wrote:
> The Roland dual zone mesh pads only have two piezos. According to 
td-8 and td-10 users on electronicdrums.com,  the only requirement 
> for positional sensing is the mesh head piezo to be centered.

Jun, 

Well, I thought as much, but the three piezos threw me. I've been 
checking out what the Hart lovers at vdrums.com have had to say. 
Surprisingly, no one mentions the third trigger--only the advance of 
the Pro over the Accupad so far as plug n' play is concerned and the 
amelioration of the hot spot. If you get a clue about what the extra 
piezo is doing on the shell from the schematic, please post it. Could 
it simply be providing better coverage of the head? Apparently, the 
Accupad stopped triggering effectively an inch away from the rim. 
I'll stop speculating.

Ed