Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "moosetication" 
<moosetication@y...> wrote:
> --- OGD wrote:
> > The problem is that you would have to strike the first
> > pad with the piezo at the same time as the second pad
> > with the piezo, in order for the module to believe that
> > it is really the rim switch triggering in the first pad. 
> 
> No, I didn't quite make myself clear.
> 
> Take one mono pad, plug into a stereo input as normal.
> 
> For the second, take another mono pad and one stereo cable. Wire 
the 
> piezo (a) tip and sleeve, and (b) through the aforementioned doo-
dad 
> (the box on the whiteboard that says "somewhere in here, magic 
> happens") to ring and sleeve. The doo-dad converts a signal off 
the 
> piezo and converts it to simulate a switch closing (lo-hi, or hi-
lo, 
> whichever is appropriate). When the piezo on the second pad is 
> struck, the signal is (a) sent straight to the module and (b) 
> through the doo-dad. So, when you clout the second pad, the module 
> sees the piezo fire AND the rim switch apparently close. Hence, 
pad 
> sound from the first pad, and rim sound from the second pad.
> 
> (I'm waving my arms around here, and drawing little pictures in 
the 
> air. Can you see me?)
> 
> Stewart

Stewart,

I think I understand what you are saying. 

Pad1(piezo) ==> input 3 - pad trigger

Pad2(piezo) ==>[magic box]==> input 3 - rim trigger

Right? (I got up on a really tall ladder to try and make out you arm 
motions in the states here, but with the sun going down, my 
interpetation maybe a little fuzzy. 8^> .)

I think the magic box could be made to work. The only problem is 
from my experimentation this past weekend, is that Pad1 and Pad2 
have to struck at the same time for the rim trigger to respond 
inside the module. It appears that the module is the limiting factor 
here. It is expecting to see a signal from piezo at the same time it 
see the rim triggering.

So if we can get the normal rim switch from another pad to trigger, 
without having to strike the pad piezo, then it would be just a 
matter of making the magic box. 


Let take my pads apart again tonight and try something else I just 
thought about doing on the drive home from work and I'll report back.

OGD