Yamaha DTXpress/DTXplorer/DTXtreme

Hello again,
Thank you all for your comments, I went home and I moved the ride 
onto the rack/cross member where tom 3/floor tom is, I then  
adjusted the Gain, Minimum Velocity and all relevant Rejection 
settings and Hooray, all is well. NO it is not broken, that's the 
best part. Now I don't have to hit it so hard also. All this makes 
me happy, as now I only get what I hit, no extras.
Once again, thank you all, I found all comments very helpful, 
particularly OGD for your extensive input.
Cheers,
Rhys


--- In DTXpress@yahoogroups.com, "Damon, Rob" <rdamon@m...> wrote:
> Welcome to the board. This may not answer your question, but here 
is a
> response I made at the Dtxperience site. Just remember that E-
drums need
> to be played with a lighter touch than A-drums. Also, the Yamaha 
cymbal
> pads historically have had a "self-choking" issue if you strike 
the pad
> and press through the rim, as oppose to, bouncing off the edge. By
> keeping pressure on the rim switch in a downward motion with the 
stick,
> it can be interpreted by the module that you are actually holding 
onto
> the edge of the cymbal pad and pressing down on the top surface, 
and
> thus want the cymbal to choke. A glancing blow works better on 
cymbals.
>  
> :Re: no sound response intermittently 
> ________________________________
> 
> The quick answer is "rejection". 
> 
> What you must understand is that each pad has a peizo in it that 
detects
> "vibration". They are not smart devices. They cannot tell if the
> vibration is from you hitting the pad with a stick, you foot 
bouncing up
> and down on the hihat pedal or if an adjacent pad has been struck. 
> 
> There are generally three types of rejection settings to eliminate 
cross
> talk, but these can also, if set to high can inadvertently cause a 
pad
> not to sound.
> 
> The first rejection settings is for the pad itself. When you hit 
the
> pad, the peizo does not vibrate one time and then stop. The signal 
peaks
> and then dies down over a period of time. If the first peak from a 
real
> strike is large and causes the pad to vibrate, along with the 
rack, then
> the continued vibration is picked up by the peizo, it thinks it 
has been
> struck again, but more lightly and thus a second sound will be 
produced.
> This is called double triggering. By adjusting the "self rejection"
> settings, you can draw a balance. If the setting is two small, the 
pad
> will be more prone to double triggering. If it is set too high, 
then a
> second very quick strike, would be muted out. 
> 
> The second rejection settings is a general rejection. This takes 
into
> account the general area where the kit is located and where/how 
the pads
> are mounted. If you hit the rack, that vibration is passed through 
to
> all the pads on the kit, but at a lower level. This rejection sets 
an
> overall level of rejection for the pad for the local environment. 
Set
> too low and hitting the rack with your foot could trigger the pad, 
set
> too high and lighter hits (ghost notes) on the pad itself may not
> register.
> 
> The third rejection settings is a "specific rejection". This is 
for when
> you strike a specific pad (say tom1) and it triggers a second pad
> (tome2) as well. This should be set to the lowest number necessary 
to
> eliminate cross trigger.
> 
> Each one of these adds a level of checking to try and control when 
a pad
> should sound and when it should not. On top of that when you add 
the
> sensitivity adjustment knob on the pad itself, you are adding 
another
> layer of issues the must be coordinated. 
> 
> So it really is a trial and error, based on where you play and how
> hard/soft you play. 
> 
> When a pad does not respond, (and it is not a physical damage 
issue), it
> is because the module is evaluating all of the signals coming in 
from
> the pads, and based on the threshold and rejection settings it 
tries to
> determine if that pad should sound or not. 
> 
> If the rejection settings are too high, then vibration from an 
adjacent
> pad, could be mis-interpreted and cause the module to mute that 
strike. 
> 
> With the Dtxpress II/III std, the with the hihat pad and the snare 
pad
> mounted on the same rack arm, the modules came from the factory 
with a
> high rejection settings between the two, so that if you hit both 
pads
> simultaneously, one pad would be muted.
> 
> Anybody here who has seen photos of my kit, knows there are large 
number
> of pads, very close together. My setup started with setting the 
general
> rejection setting. I put all of the specific rejection and self
> rejections settings as low as possible. I then turned on a cd 
player
> running through my KX1200 and KA500 amps and watched for any 
triggering
> of the pads. At high volumes with heavy bass and zero rejection
> settings, most of the pads will trigger. I then adjusted the 
general
> rejection setting to eliminate false triggering for most pads. I 
also
> adjusted the location of the amps and the direction they were 
facing to
> minimized the effects on the pads. I then took a rubber mallet and 
began
> striking the rubber feet of the rack, to simulate vibrations 
coming from
> the floor through other sources. I then went out an purchased some
> 24"square interlock floor mats to put the entire kit on. Wood 
floors
> with carpet or concrete floors with carpet I quickly learned, 
transmit
> vibration too well.
> 
> Next, I adjusted the self rejection settings for each pad. 
> 
> Then lastly, I adjusted specific rejection with all of the pads
> unplugged, except the one I was adjusting. I then played an 
aggressive
> toon, to see if striking other pads would trigger the one that was 
still
> connected. If none triggered it falsely, I then moved on. You can 
also
> use the meter bridge on the module to determine if a pad is 
trigger.
> With all of the pads plugged in and the sound on, if an adjacent 
tom
> triggers, but at a lower volume, you may not hear it, but it will 
show
> up on the module display. 
> 
> It was a long and tedious process for me, but I am good to go now. 
I am
> sure there are many other ways of doing this, but this was how I 
ended
> up resolving false triggering issues.
> :
> OldGuyDrummer - OGD 
> 
> ________________________________
> 
> From: DTXpress@yahoogroups.com [mailto:DTXpress@yahoogroups.com] On
> Behalf Of rhys_nataly
> Sent: Friday, September 16, 2005 7:03 AM
> To: DTXpress@yahoogroups.com
> Subject: Spam:[DTXpress] Crosstalk
> 
> 
> Firstly I want to say hello :). I have just recently purchased the 
> DTXpress, second hand, great kit. I have joined this group because 
it 
> looks very helpful and you all seem a happy bunch :).
> Any way my problem:
> At first all was well then (unless I didn't notice at the start) 
major 
> crosstalk(CT), when I hit the snare or crash(crash Triggers 
> occasionally and sometimes quietly also) they have CT with tom 1, 
I 
> changed the settings in Specific Rej and Self rej etc none of this 
> worked. Good plan, I moved the snare off the same rack as the tom 
1 
> (the short one pointing up) and put it on the cross rack by its 
self 
> no more CT AT ALL hooray. Now the crash, I moved this to the rack 
with 
> the brain, it still has CT and triggers occasionally etc, I 
thought it 
> may be broken??? I have now swapped it (completly) with the ride 
(to 
> check if it is broken), NOW this is strange, it still does not 
trigger 
> all the time etc(must be broken I'm thingking) but the most 
amazing 
> thing is it still has CT with tom 1??? WHY??? If the original ride 
did 
> not have CT with anything then settings must be right and all 
should 
> be ok??. what am I missing. is the information (settings) 
processed at 
> the trigger or at the brain?? :( 
> 
> 
> 
> 
> 
> 
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> 
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> 
> 
> 
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