Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "liberatusvirus" <liberatusvirus@y...> wrote:
> --- In DTXpress@yahoogroups.com, "jtatsuoka" <jtatsuoka@y...> wrote:
> > Unfortunately you will have to decrease the output of the Roland 
> pads to match the sensitivity of the DTXpress.
> > You will get a 99% triggering on a low to medium strike of the v-
> pads.  No tweaking will cure it.  All yamaha pads have a 
> potentiometer 
> > inside the pad to accommadate the lack of input sensitivity on the 
> modules.  Once you do decrease the output with a 250k pot, you will 
> > enjoy a very responsive combination.  
> 
> Hi Jun,
> 
> You've made this valuable point before, and I'm not doubting it. But 
> I'd like to establish it further if possible. My limited experience 
> with running Roland equipment through the Yamaha module seems to run 
> counter to your warning, and at least one person on this board has 
> mentioned an attenuated signal on the Roland mesh snare rim, without 
> any reverse situation on the body proper. Though I haven't mixed the 
> snare with the Xpress, the Roland CY-6 cymbal did not seem to 
> distinguish itself from Yammy pads by excessive gain--quite the 
> opposite. I let it go because I didn't find it responsive enough. 
> Moreover, Pintech products, which traditionally have been 
> manufactured with Roland modules in mind, do not exhibit that 
> problem; nor do the Harts--again quite the opposite in both cases. 
> Are there owners of Yamaha/Roland tandems who could comment on their 
> experience? OGD, and others, have you run across the potentiometer, 
> or its effects, in your dissection of the Xpress pads? We could build 
> some definitive recommendations and electronic profiles by following 
> up on Jun's statement.
> 
> Ed
The original poster mentioned compatibility with the Roland snare and kick.  For the mesh head portion of the snare and the kick you will 
need a potentiometer.  The signal from the rim of the snare might not need it or is too weak because the rubber on the rim acts as an 
attenuator.  Probably the same with the material on the Roland cymbals.  The fact that you were not able to use the Roland cymbal, 
because of a weak signal,  proves that the DTXpress does NOT  have an input gain.  If it did you would have been able to turn the 
sensitivity up. The DTXpress does have a 'gain' and 'mvel' but as you know decreasing the 'gain' does not affect the percentage that 
shows up on the display. The  picture of the Yamaha pad by OGD depicts a surface mount potentiometer on the little circuit board. Try 
turning that up and down. You will experience either too much or too little gai
I believe Pintech had any module with a sensitivity knob in mind not just Roland.  Pintech used to advertise with Alesis modules until 
Roland bought them out. Yamaha modules are the only modules on the market that lack an input sensitivity.  Even the lowly Alesis D4 
has one.   

Ed, you use Pintech?  What values are your 'gain' and 'mvel' set at?  Are you experiencing a 'perfect percentage' response? If you are 
reaching 99% before maximun velocity,  you should try spicing a cheap cable and inserting a 250k pot.  Set your 'gain=99' and 'mvel=1' 
and adjust the pot until you achieve optimum performance.
Jun


 
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