Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "jtatsuoka" <jtatsuoka@y...> wrote:
> I just saw a pict of the  Hart Prosnare innards along with a 
schematic and understand why it probably won't work on a DTXpress.  
Under  
> the mesh head is a approx. 6 inch foam cylinder  (1 inch diameter) 
positioned in the center that transfers  energy to a 10 inch 
diameter  
> aluminum plate.  The piezo is  underneath this plate.  This 
probably eliminates the hot spot that Roland mesh pads are know for 
but 
> would be WAY too small of a signal for the DTxpress. 

Jun,

Seems plausible. 
  
> According to this schematic the Prosnare has 3 piezos.  One under 
the aluminum plate and TWO on the shell of the drum.   One of the 
> shell  piezo's and the center piezo is wired in parallel. This is a 
very curious third piezo.  It would seem every time you hit the rim 
the center 
> sound triggers too?!

I'm just guessing, but maybe the parallel piezos create a kind of rim 
to pad effect, or, more likely, are used for positional sensing with 
certain voices, via the Roland TD-10's expansion card.

Ed