Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "Keith" <keith@k...> wrote:
> 
> --- In DTXpress@yahoogroups.com, "zapaxe" <a_zapelectric@h...> 
wrote:
> > 
> > FSRs & piezos...Ok I know what a piezo is, but what's an FSR? 
> > 
> 
> Force sensitive resistor.  In English - a rubber switch.
> 
> Be careful hitting piezos directly - I know they are cheap but they
> can easily be broken if they are thin.
> 
> Keith.

---------------------

Thanks Keith,


Hmmm...I remember seeing a diagram, pictures of a pad torn apart and 
explanantion of different trigger types within a dual trigger Yamaha 
pad a couple of years ago. This was on a DTXpress site of some sort 
that I don't have saved anymore. I remember the site's main page 
showing a picture of the 'DTXpress I' module at the time.

Is there a link to what this FSR (rubber switch) looks like for an 
example? Your explanation seems very clear, but I still would know 
one if it bit me:o
I'd like to experiment and make some trigger pads of some kind. I 
know I can use the piezo for a single trigger device, but if I want 
to make a dual trigger device I'll need to get my hands on one of 
these FSR's no doubt.
I'm guessing that these piezo's and FSR switches are used in a dual 
trigger pad so that the pad can't trigger two sounds due to the 
vibration, as well as the module being designed for this.

Last night I was experimenting with a stereo 1/4" phone plug and 
that piezo (still in it's plastic housing at this time & I was 
tapping it lightly) I connected the wires to the (black wire) 
grounds on both the piezo & 1/4" stereo phone plug. I then touched 
the positive (red) wire from the piezo to the center to middle 
connections on the stereo plug. 
It only made a sound on one - I 'think' center connection??? Anyway, 
I'm guessing that the piezo is for the pad sound and this FSR switch 
is for the rim sound of say a dual trigger pad and that's why I only 
get one sound.

Naturally is I plug into the 9/10 jack of the module I get TWO 
sounds by touching my possitive lead to the center & middle 
connections on the 1/4" phone plug. 
I do understand 'somewhat' that the 9/10 jacks are capable of 
producing sounds from two different sources or pads if a 'Y' cable 
is used, while the other trigger inputs (snare, toms etc..) cannot. 
But these 'others' can trigger two sounds from a dual trigger pad.