Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "peatybass" <peatybass@...> wrote:
>
>    What is the purpose of the DTXpander? Does it allow you to combine  
> two single zone peizo pads into one dual zone input like you would on 
> input 9/10? I am already using input 9/10 for this purpose and have 
> made my own splitter. I have a background in electronics but I'm 
> having trouble understanding the DTXpander circuit. I have the 
> DTXpress I(one) and I'm wanting to add more pads(triggers). If the 
> DTXpander circuit will allow this to happen what inputs can I use? 

Yes, it allows you to put two single zone pads into one input. 
However, inputs 9/10 are different - you can do it without an expander
box (as you have done) because it is really two seperate single zone
inputs.  The rest are piezo+rim switch inputs so cannot be split in
the same way.  There is a limitation to this way of expanding - you
cannot hit two pads connected to the same input through the expander.
 This limitation does not exist on 9/10 because it is two genuinely
separate inputs.  So, you need to choose the pads to combine with care.  

Keith.