Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "Scott" <papaholdy@...> wrote:
>
> Sorry, but what is the DTXpander? The files related to it on the group
> site are schmatics that I do not understand. Is it something I can
> buy? Or do you have to make it? And does it allow you to split the
> signals (IE an 3 zone pad in jack could handle 3 single pads plugged
> into it with out signal bleed)?

The DTXpander is something I originally designed to allow people to
plug two pads into one input (eg a tom input) to allow expansion of
the kit using the unused stereo inputs.  For example, all the toms are
single zone, but the inputs are dual zone, so it allows you to add
three extra pads by "sharing" the tom inputs.  The extra pad will
appear as the "rim" input of the tom.

It has limitations because you cannot get both the rim and main pad
sound simultaneously, so it needs careful selection of what you use it
for.

Another use is for interfacing drums like the Pintech Concertcast dual
zone snare.  This uses two piezos rather than one piezo and a rim
switch, so would need two inputs on the DTXpress.  With the DTXpander
it can use one input.

Originally I made the circuit available for non-commercial use so
people could build their own because I didn't have time to make them.
 Since then I have made a PCB and built a few for sale for people who
are not confident in building their own.

Keith.