Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "emf" <liberatusvirus@y...> wrote:
> --- In DTXpress@yahoogroups.com, "Keith" <keith@k...> wrote:
> > The "threshold" I was thinking of is the one that I use to detect 
> the
> > "rim" pad being hit and so switching the rim switch.  The threshold
> > needs to be adjustable because if it is too sensitive then it will
> > trigger due to rack vibration instead of becuase of hitting the
> > correct pad.  My first setting of this threshold worked fine with 
> the
> > pads on the floor (carpet) but as soon as I put it on the rack I 
> could
> > only get the rim sound - even tapping the other pad slightly was
> > detected by my oversensitve threshold.  This is now fixed.  I think 
> I
> > understand what you are saying about the DTX v2.0, but I think this
> > adjustment will still be required.
> 
> Keith,
> 
> Right. I got it. My ancillary point is that the DTX allows the rim 
> voice to change by velocity, which is presumably a feature of gain, 
> rather than MIDI voice-volume per se. If so, it might affect the 
> threshold adjustment in the magic box, and vice versa. In other 
> words, the two would be interactive at best and conflicting at worst. 
> Am I off the track?
> 
> Ed

I don't see any conflict.  The threshold I am putting in the magic box
is just a minimum level below which the rim switch will not switch. 
Ideally this will be set low so you can play very gentle sounds on the
pad connected to the rim input.  The only reason for needing it is
rack vibration from the pad on the SAME input affecting it.  If the
threshold is set low you will still get a wide range of volume inputs
depending on how hard you hit it.  It should still allow the DTX to
change its sound based on velocity.  

One question, when things refer to "velocity" do they really mean it
or is it based on how hard you hit it, which is not necessarily the
same thing (amplitude would probably be a better term than velocity)?
Velocity seems limited by the natural resonance of the piezo itself,
but amplitude depends on how hard you hit it.

Keith.