Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, rdamon@m... wrote:
> > During my surgical work on the HH65 this past weekend, the HH65 
has more
> > than open/mid/close.
> > 
> > The curved rubber pad that gets depress has four notches on the 
bottom of
> > it and can create five distint sounds. (no contact, notch 
1,2,3,4). Just
> > from pressing the footpedal it was hard to hear them, but by 
striking the
> > fsr directly with my finger and tapping on the hihat pad, it 
became quite
> > clear.
> > 

OGD

That's really interesting. What does the literature for the HH65 say? 
Is there any indication that the 65 surpasses the 60 in available 
sounds? As I recall, the 60 explicitly got only 3 distincts sounds, 
no bones about it, though the module is capable of more. Could there 
be something mechanical that keeps the pedal from engaging every 
notch even though you can do it by hand? In other words, could the 
notched rubber pad be the same in all models, whereas the mechanics 
of the pedal are more finely tuned? That might make sense from a 
manufacturing standpoint, though I can't envision either how it would 
be done or the result for the HH80 as satisfying the description 
of "fully variable."  My gut tells me that the HH80A is not notched 
at all, working on a continuous resistor, which would mean that the 
65 is a distinct improvement on the 60, at least theoretically.

The Visu-lite hi hat controller for which Tom Pickard made the design 
is based on the HH80A, which is advertised as fully variable. But the 
fact is, the actual range of variability on the Visu-lite suggests a 
hat that does not have a large physical range of motion, which works 
for me. So again, it's hard to tell how many actual positions the 
HH80 might have if it's based on notches. The Visu-lite works on a 
sort of dimmer-switch principle, in which the pulling of a metal cord 
elicits from the module the range of open to closed, which would 
suggest that its precedent was continuous rather than notched. But I 
ain't no electrical engineer.

Ed