Yamaha DTXpress/DTXplorer/DTXtreme

So I bought all the parts today and tried building the circuit and
couldn't get it to work. I have no idea whether it's me or not because
I'm really bad at all this, especially soldering. I bought double the
parts so I'm going to give it one more try anyways.

The input and output is mono correct? I tried using mono cables for
the input and output and also tried all combinations using stereo and
mono cables. I'm sure this should be pretty easy, but I half way know
what I'm doing in the first place.

I guess I'm going to have to give up soon, even though I wanted this
to work pretty bad. If for some reason you ever get ahold of this game
and one of the kits and can figure it out make sure to post on here
how you did it because I'm pretty desperate to get this to work.

--- In DTXpress@yahoogroups.com, "Keith" <keith@...> wrote:
>
> Well, I have uploaded my best guess to the files section as "Rock Band
> interface".  The components aren't critical - use any general purpose
> NPN transistor.  I can only guess at what's inside the Xbox/PS3, but I
> am guessing a simple pull-up resistor internally.  The circuit has no
> power so it won't be able to do any harm - it will just either work or
> not.
> 
> There is no difference between the kick and cymbals in principle -
> they both generate a voltage from a piezo.  However, there are subtle
> differences apart from signal size.  There is an adjustment pot on the
> KP65 - try turning it up.  The other differences are the ringing that
> you get on the cymbal signal so it will generate positive & negative
> pulses.  The KP65 is more damped, from memory.  So it may be
> worthwhile reversing the connections of the KP65 (top to sleeve and
> sleeve to tip) to swap the pulse polarity & see if that makes it work.
> 
> HOWEVER, I WOULDN'T RECOMMEND PUTTING PIEZO SIGNALS INTO EQUIPMENT
> THAT ISN'T DESIGNED FOR THEM.  I know people seem to get away with it,
> but there is a risk.  The voltages can be quite high and could blow up
> what you are plugging it in to.  Something like my circuit provides no
> power to the box, so can do no more than a switch.
> 
> Keith.
>