Thanks Keith for the prompt reply...

to be honest i was not thinking about "piezos" to trig my Acoustic
Snaredrum.. but to a "CLAMP TRIGGER" (is this the correct name ??)
the best example is the totally red type from DDrum.. do u remember
it??... well.. why a trigger like this wont work with my DTXII module??..

coming back to "piezos"... it would be a real cheap solution..
and i could use 2 channels on my module.... but piezos works properly
with DTXII module or i need to reprogram each channel once installed ??

Last thing.. WHERE TO STUCK PIEZOS ??
1 directly under the mesh head and 1 on the wood board of the Snare???

sorry but it's my first attempt in this field..
:-)




--- In DTXpress@yahoogroups.com, "Keith" <keith@...> wrote:
>
> Greetings, Gianluigi.
>
> Assuming you have made a snare with two piezos you have two choices -
> use two inputs on your module or build a DTXpander circuit which will
> convert the rim piezo signal into a switch signal. See the files
> section for the circuit diagram.
>
> While a Roland is an option, the cheaper Rolands are the same as the
> Yamaha - they use a single piezo and rim switch rather than two piezos.
>
> Keith.
>