Yamaha DTXpress/DTXplorer/DTXtreme

Just to throw out a quick thought.  The KP65 piezo, unlike the PCY/TP pads
has a substantial amount of pading between the surface of the rubber and the
actual piezo.
 
On the PCY, the piezo has a thin layer of plastic and rubber pading between
it and the striking surface, nothing to temp/permanantly deform to any
degree. On the TP the piezo has a metal plate and a thin layer of rubber
pading between it and the striking surface, again nothing to
temp/permanantly deform to any degree.
 
But on the KP65 there is a heavy rubber cover that is not bonded to anything
and behind it is a thick layer of foam that is bonded to the metal plate
that secures the piezo. After repeated heavy blows to the KP65 the following
could and will occur:
 
The outer rubber cover could be pulling away from the foam as it temp.
stretches from repeated strikes.
The thick foam behind the pad could be compressing and not expanding back
out quick enough to make contact with the outer rubber pad. 
 
I used to leave my foot on the pedal with the felt beater pressed against
the rubber pad between beats and would end up having similair missed beats.
Since I stopped leaving the beater pressed against the rubber pad, the
problem has disappeared for me.
 
I wonder if putting some adhesive between the rubber pad and the foam to
bind them together would help?
 
The other possibility is simply a loose connection.
 
Other things to look at are the settings such as the curves; normal, loud1,
loud2, hard1, hard2 and Self rej is set to a low number. 
 
 
OGD

   _____  

From: nugeman2004 Sent: Monday, May 03, 2004 9:49 PM
To: DTXpress@yahoogroups.com
Subject: [DTXpress] Re: DTXpress 1 Bass drum trigger problem


--- In DTXpress@yahoogroups.com, "emf" <liberatusvirus@y...> wrote:
> --- In DTXpress@yahoogroups.com, "robert_cathy" <robert_cathy@y...> 
> wrote:
> > Has anyone heard of this problem, sometimes but not always when I 
> am 
> > hitting a snare, cymbal or highhat, the bass drum doesn't trigger 
a 
> > sound even thought it is being hit? It is a intermitten problem 
> that 
> > I have to listen closely to hear. My daughter is trying to learn 
> and 
> > that how I found it. Any ideas? Any solutions?
> 
> Hi Robert,
> 
> Dropouts aren't terribly unusual. But, as Will's post indicates, 
the 
> kick pad isn't usually the victim--at least for interactive 
reasons. 
> When a pad on the rack gets hit, the rack can transmit vibrations 
to 
> one or more of the other ones, causing a sympathetic reaction. This 
> phenomenon is called crosstalk, and Yamaha has "rejection" settings 
> to minimize it in the trigger menu. Rejection's remedy for a pad 
> firing unintentionally as a result of events on other pads is to 
mute 
> it unless it is hit with a certain minimum force (the rejection 
> number). "Specific rejection" protects a pad from hits on a certain 
> other pad, normally close to it, in the same manner. "Self-
rejection" 
> guards against a pad reacting to itself (double-triggers), usually 
> because gain is too high. If a drummer fails to strike a pad with 
> enough force to circumvent the muting enabled by any of these 
> rejection parameters during another offending event, it won't make 
> any noise. Many dropouts are caused by rejection settings that are 
> too high. By all means, if the kick drum input carries high 
rejection 
> numbers, reduce them to the point where the offending artifacts 
> disappear. 
> 
> That said, however, the fact that the kick pad isn't on the rack 
> reduces the chances that rejection as a means to defeat crosstalk 
is 
> the culprit. A high self-rejection is still a possibility, though 
you 
> would have known if you'd set it, right? One other possibility is 
> that your gain and/or minimum velocity settings aren't optimal. If 
> gain is too low and min.vel. too high, you could get false 
> triggering. It might not happen when you play the kick by itself, 
but 
> in the heat of battle when your attention is divided, the kick 
might 
> not be getting the same impact. Try changing the gain and min. vel. 
> settings as indicated. 
> 
> A last resort might be that the something has come loose inside the 
> kick tower. Sometimes resoldering everything can improve response, 
> even if you don't actually see a loose connection somewhere. 
> 
> I hope these suggestions help. Please let us know. If worst comes 
to 
> worst, are you still under warranty? I should add that if you're 
> using the KP60 kick pad, I'd be far less surprised by your problem 
> than if you were using the the KP65.
> 
> Ed
I too, have the same issue! when playing as Ed said "heat of the 
battle" and do an accent of snare and cymbbal, the kick almost always 
will not sound, And I am certainly kicking it! I have tried it with 
the tower yammy set up , as well as a pintech trigger,the small 
cylindrical one (scientific,no?) and the results are about the same. 
I did have some issues with the yammy stand up trigger,and had to 
disassemble and solder the jack terminals back solidly to the pc 
board...that cured the hit/no sound, but not the no kick response 
when hitting cymbal(any) and or cymbal/snare /kick...any ideas Ed? kb



 
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