Yamaha DTXpress/DTXplorer/DTXtreme

Perry,

If the problem is erotic, the module should take a cold shower, and 
the hh and snare should be separated from each other. Apparently the 
DTXPII, unlike earlier versions, shipped with default settings that 
caused the hh and snare to interfere with each other. Strictly 
speaking, if the snare is programmed in the trigger menu to 
specifically reject the hh at too high a setting, the snare will 
sometimes fail to sound, because rejection essentially mutes a pad 
for a micro-second so that it will not react to another pad's hits. 
A spec. rej. setting of, say, 9 to protect snare from hh means that 
only hits on the snare that register above 9 will voice when the hh 
is hit. Since 9 doesn't leave much room for the snare to trigger 
even with its own hits when the spec. rej. of the hh takes hold, it 
simply shuts down. For more detailed advice, search the posts over 
the last few months for "snare and hi hat" or something similar. I 
think Yamaha was notified of the problem, and users have been able 
to overcome it within the module.

A high gain setting in general will make a trigger more susceptible 
to interference, or crosstalk, from other hits on other triggers, 
simply because increased gain means increased sensitivity to force--
that is, vibration from elsewhere on the rack can activate it. A low 
min. vel. has the same effect; lowering a trigger's min. vel.--the 
least force at which it will sound its voice--makes it more likely 
to succumb to crosstalk. That doesn't mean that you can't make 
relatively sensitive adjustments to these parameters--only that 
you'll have to balance them with rejection settings that allow them 
to work without crosstalk, or not too much of it (even acoustic 
drums and cymbals react to each other a little). Remember, though, 
that to reject interference from a pad means to silence that pad 
during other events for a moment; it does not do anything to the 
offending trigger. You can see why care with rejection is so 
important; keep settings only as high as necessary to do the job. 
Silencing the pads is hardly what we want to do. It's all a delicate 
balance.

It is possible that with certain trigger parameters, and 
circumstantial factors like how stable the drum riser or platform 
is, live band activity could make your triggers fire a little. You 
might have to tell the bass player, for example, to stop bouncing up 
and down near your kit. But unless you're shaking like a 25 cent 
step ladder, it's more likely that the problem mostly involves the 
interaction between the pads. When you're playing in a band 
situation, you're probably playing harder, thereby putting a strain 
on all your settings.

Ed

--- In DTXpress@yahoogroups.com, psmperry@a... wrote:
> I have been having the same problem with my hi hat and snare. The 
snare drops 
> out sometimes when I am also playing the hi-hat. Additionally, the 
snare 
> volume will be erratic, or is that erotic, I'm not sure...but 
anyway... could 
> you explain what effect adjusting the gain and rejection has on 
performance. 
> That is, what does lowering or raising these parameters do 
exactly. I have 
> also noticed the problem is more pronounced when I am playing with 
my band. 
> Could other electronic sources cause a problem? 
> 
> perry

--- In DTXpress@yahoogroups.com, psmperry@a... wrote:
> I have been having the same problem with my hi hat and snare. The 
snare drops 
> out sometimes when I am also playing the hi-hat. Additionally, the 
snare 
> volume will be erratic, or is that erotic, I'm not sure...but 
anyway... could 
> you explain what effect adjusting the gain and rejection has on 
performance. 
> That is, what does lowering or raising these parameters do 
exactly. I have 
> also noticed the problem is more pronounced when I am playing with 
my band. 
> Could other electronic sources cause a problem? 
> 
> perry